24 results about "PHYSICAL FORCES" patented technology

Embodiments of the invention provide an active pen-stylus that emulates a paper feeling for users of the active pen-stylus. The active pen-stylus comprises a writing shaft that receives physical forces arising from use of the pen-stylus by a user. The active pen-stylus also includes a force sensor that receives forces from the writing shaft, the force sensor configured to convert received forces into an electronic signal. A writing spring receives forces from the force sensor and reflects back to the user a reactionary force that emulates a paper feeling. The writing spring compresses and undergoes geometric deflection in creating the reactionary force that emulates the paper feeling. The geometric deflection produced by the writing spring arises from deformation of the writing spring by the received forces.

An omnidirectional mechanical drive unit in a robot may be controlled by a processor. An input message characterizing a physical force exerted on a force sensor in a first direction may be received. A physical force input vector quantifying the physical force in two or more dimensions may be determined based on the input message. Upon determining that a triggering condition for navigational feedback is satisfied, a haptic force input vector for provide haptic navigational feedback via the omnidirectional mechanical drive unit may be determined. A force output vector aggregating the physical force input vector and the haptic force input vector may be determined. The force output vector may quantify a force to apply to move the robot in a second direction. An indication of the force output vector may be transmitted to the omnidirectional mechanical drive unit. The robot may be moved based on the force output vector.

This invention provides a method for online force assessment of characters in a virtual reality environment, aiming to achieve real-time quantitative assessment, physical accuracy, and high robustness of force on humanoid character movements in virtual reality environments. This method combines a motion generation model and a physics optimizer, using an end-to-end integrated approach to dynamically estimate key mechanical parameters such as joint torque and ground reaction force. Specific steps include: acquiring user motion trajectory data from sparse sensors (such as VR headsets and controllers); generating preliminary full-body motion postures using a motion generation model based on discrete latent space learning; performing physical correction and force estimation on the motion using a physics optimization module (employing a dual proportional-differential controller and a motion tracking optimizer); integrating motion data and force parameters; and outputting character animation and force visualization results in real time through a rendering engine. Through the collaborative design of motion generation and physical force assessment, this invention significantly improves the realism, real-time performance, and adaptability of virtual character movements, making it suitable for VR applications such as security monitoring, medical training, and sports simulation, enhancing immersion and interaction efficiency.

A sound conversion method in virtual reality implemented by a sound conversion system in the virtual reality according to an embodiment of the present invention includes forming a virtual atmosphere in the virtual reality, generating a physical force in the virtual reality, and generating virtual data on the virtual atmosphere on the basis of the physical force, wherein the virtual data is data on a state of the virtual atmosphere changed by the physical force.

The present invention relates to fully autonomous self-navigational medical devices which can be transported within a host subject without existing physical constraints, including those of current physical force limitations, and which are free to undergo a variety of structural and functional adaptations including the ability to perform real-time dynamic adjustment and adaptability to ever changing physiologic, anatomic, and pathologic conditions within the host subject.

A method for analyzing change in a mode of a unidirectional composite material includes applying a physical force of a predetermined pattern onto a unidirectional composite material specimen; sensing a vibration signal generated by the physical force at at least one sensed position thereof; performing modal analysis of a frequency response at a corresponding measurement location, based on the physical force applied to the specimen and the vibration signal measured at the sensed position of the specimen, and calculating at least one mode shape vector of the specimen based on the modal analysis result; compensating the calculated mode shape vector based on a distance between a normal line passing through a center of the specimen and the sensed position, thereby calculating a modified mode shape vector; and calculating a first modal assurance criterion (MAC) of the specimen based on the modified mode shape vector.

The application relates to a pedestrian motion trajectory evolution method and system based on a social force model, and the method comprises the following steps: setting a simulation environment, obtaining the initial position of pedestrians from a video; obtaining the actual force of the pedestrians at the collision moment and the non-collision moment according to a pedestrian dynamics model, updating the speed of the pedestrians according to the speed change of the pedestrians with time, and then updating the position of the pedestrians; obtaining the pedestrian motion trajectory according to the position of the pedestrians at each moment; wherein the construction process of the pedestrian dynamics model is as follows: obtaining the interaction force between the pedestrians and other individuals and the interaction force between the pedestrians and walls based on the social force model; constructing the social force, constructing the physical force according to the contact or collision action between the pedestrians and other individuals, and constructing the speed change of the pedestrians with time; and constructing the pedestrian dynamics model. Compared with the prior art, the application can more accurately reflect the actual force condition between the pedestrians under different situations, and the dynamics analysis is more in line with the actual situation.

The present application relates to the technical field of force feedback system, and particularly relates to a physical force feedback system for human-shaped robot and environment interaction, which comprises an object force analysis module, an object deformation analysis module, a control module, a grasping force judgment module and a communication module; the object force analysis module is used for analyzing and obtaining relevant information of object force, and transmitting the relevant information to the control module; the object deformation analysis module is used for analyzing and obtaining relevant information of object deformation, and transmitting the relevant information to the control module; the control module obtains a grasping index according to the relevant information of object force and the relevant information of object deformation, and transmits the grasping index to the grasping force judgment module; the grasping force judgment module obtains information that the grasping force of the robot is too large or appropriate according to the grasping index, and transmits the information to the communication module; the communication module transmits the information that the grasping force of the robot is too large or appropriate to a robot hand execution module.

To provide a cleaning method capable of improving cleaning effect by easily and reliably applying physical force using water and oil without using a large amount of cleaning solvent, even when cleaning an object to be cleaned requires cleaning with particularly strong physical force. [Solution] The object to be cleaned 7, which has been heated to 100°C or higher, is immersed in heated water 4 mixed with abrasives 6. When the object to be cleaned 7 comes into contact with the heated water 4, the pressure of the steam generated and the abrasives 6 come into contact with the object to be cleaned physically remove dirt adhering to the object to be cleaned 7.

Systems and methods for detecting an occlusion in an infusion device are disclosed. One method includes generating, during an infusion session at predetermined intervals, a feature vector including an initial measurement of a physical force caused by fluid motion through an infusion device at the start of an infusion session, a current measurement of the physical force, a long term change in the measurement of the physical force, and a short term change in the measurement of the physical force. The feature vector is inputted, during the predetermined intervals, into a support vector machine (“SVM”) to output an indication of a presence or an absence of an occlusion in the infusion device. The SVM may be trained using reference data from reference infusion sessions having known consequences regarding the presence or the absence of an occlusion at various times during the reference infusion sessions.

The utility model relates to a dummy shaft for casting a motor rotor, which comprises a body, the body is provided with a head part and a tail part, the head part of the body is connected with a knocking head, the knocking head is knocked to indirectly act on the body, and the knocking head is provided with a radially through lifting hole. Through the arrangement of the knocking head, a worker does not need to directly knock the body, but indirectly acts on the body through the knocking head, so that direct contact between the knocking piece and the body can be avoided, deformation of the body is avoided, and a lifting rope can pass through the lifting hole to lift the whole body; and meanwhile, the body and the knocking head are coaxially arranged, so that the uniformity of physical force transmission to the body when the knocking head is knocked is facilitated, and local deformation of the body caused by eccentricity of the knocking head is avoided.

The invention relates to a tendon stretching and foot hanging device which comprises a traction rope winding and unwinding rotating wheel with a spiral groove and a pair of foot hanging frames, the two foot hanging frames are wound on the traction rope winding and unwinding rotating wheel which is driven by an electric mechanism and provided with the spiral groove through a traction rope so as to achieve traction driving of ascending and descending of the two foot hanging frames, and each foot hanging frame comprises an L-shaped foot support used for containing a foot sole. The L-shaped foot support is formed by connecting a foot sole part and a foot support body, a tendon stretching pressing plate with the lower end hinged to the foot support part is located on the inner side of the foot sole part, the tendon stretching pressing plate is connected with a hanging rod which is used for driving the tendon stretching pressing plate to turn over and can be lifted upwards, and the foot hanging frame is provided with a pulley block mechanism used for pulling the hanging rod. The movable end of the pulling rope pulls the hanging rod through the pulley block mechanism. The device is simple in structure and reasonable in design, the pulley block mechanism is arranged, the physical force reducing principle of a combined pulley block is utilized quite scientifically, the pulley block mechanism is combined with the tendon stretching pressing plate, the tendon stretching pressure needed by both-leg tendon stretching exercise on the sole center can be effectively achieved, the tendon stretching exercise is convenient, and the physical and psychological health effect is remarkable.

The invention relates to a computer implemented method for continuous position estimation of a moving body (BDY), comprising: (a) Providing an initial (INT) position (POS) and initial (INT) orientation (ORN) of at least one motion sensor (SNR) attached to said body (BDY); (b) Measuring motion parameters (PRM) comprising at least one acceleration (ACC) in at least one spatial direction (DRT), using said at least one motion sensor (SNR); (c) Providing a motion-model (MMD) for predicting the motion of the body (BDY), wherein the motion-model (MMD) is designed to time-stepwise determine an estimate (EST) of the translation and orientation (ORN) of the body (BDY); (d) Providing a Kalman filter (KMF) comprising a prediction module (PDM) and a correction module (CRM) both working in a repetitive loop, wherein said motion-model (MMD) is used as the prediction module (PDM) for estimating (EST) the motion of the body (BDY). It is proposed, that said model proceeding in the following steps when predicting the motion of the body (BDY): - assuming a center of gravity (COG) of the body (BDY), - estimating (EST) the physical forces (PFC) and torques that are acting on the assumed center of gravity (COG) of the body (BDY) to achieve the measured motions, - determining a prediction of the body (BDY) position from the estimated (EST) physical forces (PFC) and torques.

A mechanical drive unit for a robot may be controlled by receiving from a force sensor an input message characterizing a physical force exerted on the force sensor in a first direction. A physical force input vector may be determined based on the input message and quantifying the physical force in two or more dimensions. A force output vector aggregating the physical force input vector and a second force input vector and quantifying a force to apply to move the robot in a second direction may be determined at least in part by applying a force multiplier multiplying the physical force input vector. An indication of the force output vector may be transmitted to the omnidirectional mechanical drive unit via a communication interface. The robot may be moved via the mechanical drive unit in the second direction based on the force output vector.

The utility model discloses a novel soil tester, and aims to solve the problems that according to an existing tester, for a hard soil layer, an operator needs to apply great physical strength to push a probe into soil, and the probe is prone to being damaged to different degrees such as bending and breakage. According to the technical scheme, the novel soil tester is characterized by comprising a support, a fixing plate is arranged on the support, a rotating frame is rotationally connected to the fixing plate, a motor is arranged on the support, an output shaft of the motor is in transmission connection with the rotating center of the rotating frame, and two sliding blocks are annularly distributed and fixed to the rotating frame; and an arc-shaped groove for the sliding block to slide is formed in the fixed plate. Compared with a traditional soil determinator, the novel soil determinator has the advantages that automation of soil determination is achieved, labor intensity of operators is relieved, and the problem that the probes are prone to being damaged during operation in hard soil is effectively solved by adopting the design that the drill rod is used for pre-drilling holes and then the probes are safely inserted into the drill rod.

To provide a cleaning method capable of cleaning an object to be cleaned with a simple mechanism, taking safety and the global environment into consideration, without using a large amount of cleaning solvent, even when cleaning with particularly strong physical force is required. [Solution] After heating the object to be cleaned (12) to 100°C or higher, the object to be cleaned (12) is immersed in heated water (4), and the pressure of the steam generated when the object to be cleaned (12) comes into contact with the heated water (4) physically peels off dirt adhering to the object to be cleaned (12). After the heated water cleaning, the object to be cleaned (12) is dry-heated to a temperature of 100°C or higher using heating means (11). These steps are repeated alternately.

According to the child toy structure safety control method and system provided by the invention, the dynamic parameters of the child toy are monitored, the safety threshold is determined according to the structure risk, and the function of the interaction module is dynamically adjusted when the dynamic parameters exceed the limit, so that the situation that when key structural parts are damaged and the functions are limited is effectively avoided; secondary damage and secondary safety problems are caused to the damaged structure by an indirect force generated by operating other modules by a child, so that the secondary damage and secondary safety problems caused to the damaged structure by an indirect physical force generated by operating the available modules by the child can be effectively avoided, and meanwhile, the safety of the child can be effectively improved on the premise of ensuring the safety. And a certain possibility of low-risk interaction between the child and the toy is kept as far as possible.

This paper considers the Protein Joint Atom Modeling (SPICA) strategy and the corresponding elastic network model of physical interactions, belonging to the field of protein dynamics characterization (computational) technology. First, test sets were constructed, including 135 and 6 protein experimental crystal structures respectively. Then, the following five steps were performed: 1. Construction of the protein joint atom model; 2. Initial parameter setting and force field parameter pairing; 3. Calculation of spring force constants; 4. Construction of the Hessian matrix; 5. Parameter optimization and dynamic analysis. This method is the first to introduce the protein joint atom modeling strategy into the traditional elastic network model computational framework, while integrating the corresponding physical interaction forces, significantly improving computational accuracy while maintaining computational efficiency.

This disclosure provides a fluid simulation method, a fluid simulation device, a computer storage medium, and an electronic device, relating to the field of computer technology. The method includes: acquiring initial fluid parameters and initial velocity parameters of fluid sub-models in each grid of the region to be simulated at the current iteration number; determining the physical quantities of the physical forces acting on the fluid sub-models in each grid based on the initial fluid parameters; determining the target velocity parameters of the target grid at the current iteration number based on the initial velocity parameters of the fluid sub-models in the target grid and the physical quantities of the physical forces acting on the target grid; and generating the fluid dynamics effect of the fluid model in the region to be simulated based on the target velocity parameters of the fluid sub-models in each grid at each iteration number. This method can significantly reduce computational load, thereby reducing performance consumption, adapting to real-time fluid simulation requirements, and improving the accuracy of simulated fluid dynamics effects.

System for the non-invasive, field-based detection of resonance signals between biological units, characterized in that physiological parameters (e.g., electromagnetic, acoustic, or biophotonic signals) are detected and evaluated for patterns of synchronization or coupling, including subtle resonance phenomena that go beyond known physical forces and can be interpreted in the context of a postulated fifth force.

The present application relates to the technical field of heart rate detection, and particularly relates to a heart rate detection method based on exercise power, comprising collecting radar signals and heart rate signals under different exercise states; performing spectrum extraction of the radar signals at different distance values, calculating the volume of a body part by using the area of the body part, and obtaining the mass of the body part through the volume of the body part; calculating the displacement of the body part; calculating the speed and acceleration of the body part; calculating the physical force of the body part by using the acceleration; calculating the physical workload of the body part according to the physical force; converting the physical workload into exercise power; constructing a first LSTM model, inputting the exercise power and the actually collected heart rate into the first LSTM model to obtain a first predicted heart rate; constructing a second LSTM model by taking the exercise power and the first predicted heart rate as inputs, and outputting a second predicted heart rate. The present application estimates the heart rate based on the density, and is susceptible to the problems of individual differences, exercise types and intensities and the like.

Provided is a surgical device having maximized stone removal efficiency. A surgical device according to one aspect of the present invention comprises: a first part including a main body and a passage part provided inside the main body and configured to guide the movement of a first tube in the front-rear direction; and a second part coupled to one end of the passage part and including a stone removal part configured to apply a physical force or a suction force to a stone capturing part, which is connected to the first tube and captures stones inside a human body, and thereby separate the stones from the stone capturing part.

This invention discloses a sensorless foot contact detection method and system for robots based on multimodal fusion, belonging to the field of robot control technology. This invention acquires multi-source sensor data such as robot joint position, velocity, and initial torque; analyzes foot motion state data based on a rigid body dynamics model; and reconstructs foot contact force data through inverse kinematics. Multimodal normalized contact feature values ​​are extracted using corresponding feature mapping functions, and the foot contact state is determined and output after global weighted fusion. This invention eliminates the need for foot physical force sensors, reducing hardware costs and unsprung mass. Multimodal fusion improves the robustness and fault tolerance of contact detection, while a fault-tolerant mechanism enhances the overall operational safety margin.

The application discloses a molecular dynamics trajectory prediction method and system fusing physical force field prior, and relates to the fields of computational chemistry and artificial intelligence. The method acquires initial structure data of a to-be-detected molecular system and physical prior parameters (such as partial charge) between atoms; through a double embedding and residual enhancement mechanism, the physical prior parameters are mapped into high-dimensional features; an improved isometric graph neural network based on physical force field perception is constructed; in the message passing stage, the high-dimensional features are used to construct an electrostatic attention mechanism, to generate electrostatic interaction force features and to be reduced and fused into the updating process of edge features; finally, trajectory prediction is outputted based on the updated edge features through the isometric network. The application implicitly learns potential energy surface features without destroying isometricity, and significantly improves the physical authenticity and long-term stability of the model for molecular dynamics long trajectory prediction.