99 results about "Gravitational acceleration" patented technology

The invention relates to the technical field of inertial navigation and sensor fusion, in particular to a multi-sensor fusion and adaptive filtering attitude estimation method, which comprises the following steps: S1, acquiring sensor data of a gyroscope, a magnetometer and an accelerometer, and respectively acquiring angular velocity, magnetic field direction and gravitational acceleration information; s2, angle information is obtained, and magnetometer and accelerometer sensor data are converted into attitude information; s3, carrying out weighting processing on the angle information and the attitude information through a fading memory weighting method and a limited memory weighting method; S4, carrying out filtering fusion on the weighted angle information and attitude information through an RAEKF filtering fusion algorithm; s5, an adaptive factor and a robust factor are introduced into the RAEKF filtering fusion algorithm; s6, outputting attitude angle estimation; according to the method, the theoretical contradiction that long-term drifting and stability cannot be achieved at the same time is fundamentally solved, stable precision is kept under abnormal data interference, and the robust performance is remarkably improved.

The invention discloses a multi-parameter distortion compensation method for a fractured rock mass seepage similar model test, and relates to the technical field of rock mass engineering physical model tests. The method comprises the following steps of: firstly, determining two constraint conditions that the fluid property is invariable and the gravitational acceleration is invariable, correspondingly selecting a basic physical quantity and extracting a core criterion; then analyzing three types of distortion sources of geometric dimensions, dielectric materials and boundary conditions, and establishing a distortion function according to result parameters of seepage flow velocity, seepage flow and seepage pressure; secondly, parameters difficult to control are selected as distortion items, parameters easy to regulate and control are selected as compensation items, the distortion items are substituted into a distortion function to obtain a distortion ratio, the optimal distortion ratio of the compensation items is solved based on a compensation balance formula, and the parameters are adjusted; and finally verifying the interval range of the actually measured distortion ratio. According to the method, the multi-source distortion coupling influence is accurately quantified, the compensation pertinence and precision are improved, operation is easy and convenient, universality is high, and reliable support is provided for underground engineering seepage research.

This invention discloses a method and apparatus for calculating vehicle acceleration. The method establishes gravitational acceleration component equations based on a first set of acceleration models and a second set of acceleration models. It determines the total acceleration vector of a second sensor based on the vector coordinates of the second coordinate system relative to the first coordinate system. Based on the vector coordinates of the second coordinate system relative to the first coordinate system, it calculates the total rotational angular velocity vector and the total rotational angular acceleration vector of the second sensor in the first coordinate system. Based on the total acceleration vector, the total rotational angular velocity vector, and the total rotational angular acceleration vector, it calculates the summed acceleration vector of the second sensor at the origin of the first coordinate system. Based on the resultant acceleration vector and the summed acceleration vector in the first coordinate system, it establishes acceleration equations. Finally, it establishes and solves a joint system of equations based on the gravitational acceleration component equations and the acceleration equations to obtain the motion acceleration of each axis in the first coordinate system. This method improves the accuracy of vehicle acceleration calculation.

The invention provides a course rapid initial alignment method and device for vehicle-mounted integrated navigation, and relates to the technical field of navigation calibration, and the method comprises the following steps: based on three-axis acceleration data, eliminating a component of gravitational acceleration in a horizontal direction through attitude compensation, and obtaining a horizontal longitudinal acceleration measurement value; carrying out plane coordinate projection based on the GNSS positioning data to obtain a track point sequence; determining the horizontal displacement length of the current track point and other track points in the track point sequence; on the basis of the horizontal longitudinal acceleration measurement value and the track point sequence, the motion direction is judged through the speed change trend and the horizontal acceleration direction, the current track angle is corrected, and a corrected course angle is obtained; and based on the corrected course angle and the Z-axis angular velocity of the gyroscope measured by the IMU module, estimating the course angle error and the zero offset of the gyroscope by adopting an adaptive Kalman filtering algorithm, and outputting the corrected course angle. According to the invention, fast and accurate course initialization of combined navigation in a low-speed equipment operation scene can be realized.

The invention relates to an out-of-levelness estimation method, device and equipment of an inclinometer and a medium, and belongs to the technical field of inclinometers. The method comprises the following steps: in a hardware environment without a gyroscope, acquiring initial attitude angle information through accelerometer data sampling and alignment; performing attitude matrix construction, navigation coordinate system projection, Kalman filter modeling, attitude error calculation and error compensation to equivalently realize a gyroscope-free zero-velocity correction effect, and obtaining a final attitude angle; a self-adaptive Kalman filter based on gravity acceleration module value constant constraint is provided, so that the influence of external interference on the measurement precision can be reduced; and finally, performing smooth filtering on the final attitude angles at a plurality of adjacent sampling moments, and outputting high-precision and high-stability unlevelness. According to the method, under the condition that the hardware cost is not increased, the measurement precision and stability of the inclinometer on the out-of-levelness are improved.

The invention relates to the technical field of circuit breakers, and discloses a high-low voltage circuit breaker propelling mechanism which comprises a switching-off mechanism, a frame assembly is fixedly installed on the inner wall of the switching-off mechanism, a communication assembly is installed on the inner wall of the switching-off mechanism, and an operator pulls a spring reset rod to drive a radian stop block to move. Then a connecting rod is pushed to ascend to drive a balancing weight, a sliding rod, a spring ring and a connecting block to synchronously ascend, the connecting block ascends to push a moving contact on a moving contact supporting piece to be in contact with a static contact to enable current to be connected, when the current is large, a spring ejector rod downwards pushes an L-shaped plate to descend to enable a radian stop block to be separated from a fixing ring again, and at the moment, the connecting rod is pushed to ascend to drive the balancing weight, the sliding rod, the spring ring and the connecting block to synchronously ascend. The spring ring and the balancing weight return, and a larger initial driving force is provided by utilizing the elastic potential energy of the spring of the spring ring and the gravitational acceleration of the balancing weight, so that the moving contact supporting piece and the static contact can be quickly separated for a larger distance, the duration time of an electric arc is shortened, and the continuous combustion of the electric arc is effectively prevented.

The invention relates to a method for quickly acquiring ramp information and a vehicle running state, which is based on a first acceleration sensor parallel to the vehicle running direction and a second acceleration sensor perpendicular to the first acceleration sensor. Synchronously measuring to obtain a first acceleration component along the slope surface direction and a second acceleration component vertical to the slope surface direction; according to the projection relation between the second acceleration component and the gravitational acceleration in the direction perpendicular to the slope surface, the slope angle and the running acceleration of the current ramp are analyzed; and torque compensation control is conducted on a vehicle driving motor through the slope angle and the running acceleration. Aiming at the limitation of ramp detection of the existing GPS and gyroscope, a ramp information and vehicle running state acquisition system which is low in cost, high in real-time performance and adaptive to a whole scene is constructed by taking double vertical acceleration sensors as a basic core; the problems of slow ramp detection response, high cost, insufficient precision and load interference of the industrial vehicle in a closed and complex scene are effectively solved.

An object of the present invention is to provide a flow velocity measuring system in which a sensor is not in contact with water and which can measure a flow velocity of water with a simple configuration. Another object of the present invention is to provide a novel flow rate measurement system capable of measuring a flow rate of water based on the flow velocity.SOLUTION: The flow velocity measuring system includes a drainage pipe, a distance sensor, and a measuring unit, the drainage pipe being capable of discharging water from a water discharge port in a horizontal direction, the distance sensor being disposed at an arbitrary position facing the water discharge port at a horizontal distance D and a vertical distance Y from the water discharge port and being capable of detecting a horizontal distance Xo from the water discharge port to water, the measurement means is capable of measuring the flow velocity Vo of the water discharged from the water discharge port from Xo, D, Y, and the gravitational acceleration g.SELECTED DRAWING: Figure 1

This invention relates to the field of MEMS sensors and discloses a method and system for correcting single-axis abrupt changes in MEMS sensors, including the following steps: S1, obtaining the local gravitational acceleration reference value g at the deployment location of the target MEMS sensor; In this invention, through a dual judgment mechanism of modulus deviation and inter-axis correlation coefficient, it is possible to accurately distinguish between interference abrupt changes and real motion. Modulus deviation is used to initially screen abnormal data, while inter-axis correlation coefficient further verifies the authenticity of the abrupt change, effectively avoiding the problem of incorrect correction caused by relying on only a single indicator in the prior art. Furthermore, based on the physical law of conservation of the three-axis acceleration vector sum under static measurement, the abrupt axis is corrected using stable data of the other two axes, and an inter-axis coupling correction factor is introduced to compensate for manufacturing process deviations. The corrected data has high accuracy, and the total modulus deviation can be stably controlled within a preset threshold range, significantly improving the data accuracy of MEMS sensors in outdoor static measurement scenarios.

The invention relates to the field of MEMS sensors, and discloses an MEMS sensor single-axis abrupt change correction method and system, and the method comprises the following steps: S1, obtaining a local gravitational acceleration reference value g of a target MEMS sensor deployment position; according to the method, the interference sudden change and the real motion can be accurately distinguished through a dual judgment mechanism of the die length deviation and the inter-axis correlation coefficient, the die length deviation is used for preliminarily screening abnormal data, the inter-axis correlation coefficient further verifies the authenticity of the sudden change, the problem of error correction caused by dependence on a single index in the prior art is effectively avoided, and the accuracy of the error correction is improved. And based on the physical law of three-axis acceleration vector and conservation under static measurement, the abrupt change axis is corrected by utilizing stable data of other two axes, and an inter-axis coupling correction factor is introduced to compensate the manufacturing process deviation, so that the corrected data is high in precision, and the total mold length deviation can be stably controlled within a preset threshold range. And the data accuracy of the MEMS sensor in an outdoor static measurement scene is obviously improved.

A sensing system includes a position sensor configured to generate sensor data indicating a position of an object on a surface, the object having a first component and a second component. The first component is moveable relative to the second component. An inclination angle calculation module is configured to receive the sensor data, calculate an impact of stationary gravitational acceleration on the object, and, using the calculated impact of stationary gravitational acceleration on the object, calculate at least one of a long-term inclination angle of the object, a short-term inclination of the object, and an inclination angle of the first component relative to the second component. The long-term inclination indicates a stationary position of the object for a predetermined threshold amount of time. The short-term inclination corresponds to a period shorter than the predetermined threshold amount of time.

The invention belongs to the technical field of aircraft flight control system design, and particularly relates to an aircraft sideslip angle calculation method which comprises the following steps: S1, acquiring parameters such as lateral overload and dynamic pressure; s2, constructing a relation between a sideslip angle and lateral overload; and S3, calculating the sideslip angle of the aircraft according to the calculation relation established in the step S2. According to the method, pneumatic data analysis is started, a theoretical calculation formula is deduced and converted, and a pseudo sideslip angle formula for solving the sideslip angle according to lateral overload, a large derivative of a lateral force coefficient to the sideslip angle, gravitational acceleration and vacuum velocity is obtained. A pseudo sideslip angle signal solved by the formula is introduced into a flight control law, and when an aircraft sideslip angle signal fails, the pseudo sideslip angle signal is used for replacing a sideslip angle signal measured by a sensor, so that the lateral course modal characteristic of the aircraft can be improved, a sideslip angle limiting function is realized, the flight quality is improved, and the flight safety is ensured. And meanwhile, a speed vector symbol driving instruction can be provided for an unmanned aerial vehicle control interface.

The invention provides a multi-axle vehicle axle load calculation method and device based on finite element simulation, and belongs to the technical field of vehicle design, a vehicle structure model comprising a frame, an axle housing, a suspension support and other components is established, and the components are assembled through rigid connection. Then, a suspension system model comprising a front spring, a rear spring and a tire spring is established, and corresponding rigidity and material attributes are set; by establishing a center-of-mass connection point of a cab, a power assembly and goods and applying corresponding mass, the degree of freedom of a tire spring grounding point is restrained, and gravitational acceleration is applied. And finally, carrying out static analysis on the model after grid division, and calculating to obtain the axle load of each axle by extracting the Z-direction counter-acting force at the tire spring constraint position. According to the method, the complex structure and load distribution of the multi-axle vehicle are simulated, and the axle load calculation precision is improved; reliable load distribution data are provided for the vehicle design stage, and the suspension and frame design is optimized.

The application provides a kind of nine-axis IMU calibration method, system, electronic equipment and storage medium, method includes: nine-axis IMU is rotated around own xyz axis respectively, in different postures stationary for a predetermined length of time, IMU raw data is collected;Segment stationary state and motion state data;Average stationary state acceleration;Establish accelerometer error model, so that acceleration vector module length and gravity acceleration module length is consistent, calibrate the error parameter of accelerometer;The acceleration obtained after the initial acceleration of motion state is rotated with gyro angular velocity, compared with the end acceleration actually collected, calibrate the gyroscope through gyro error model;The change of the direction of the initial magnetometer data of motion state and the direction of the end magnetometer data is compared with the change of the angle direction measured by the gyroscope, and the magnetometer is calibrated through the magnetometer error model.The application does not depend on hardware equipment, can accurately calibrate the data of nine-axis IMU, has no scene limit, and is low in cost.

A tennis 3D trajectory reconstruction method and device based on monocular vision mainly include: real-time acquisition of monocular motion video; extracting the 2D pixel bounding box of the tennis in each frame, and splicing out the complete tennis 2D motion trajectory; taking the tennis space motion physical model containing gravitational acceleration and air resistance as the constraint condition, constructing the re-projection error function from the 3D space coordinate to the 2D pixel coordinate, taking the initial 3D position and the initial velocity vector of the tennis as the joint optimization variable, and adopting the nonlinear optimization algorithm for iterative fitting, so that the re-projection error between the coordinates of the theoretical 3D trajectory re-projected to the 2D plane and the actual tennis 2D motion trajectory is minimized, thereby inversely solving the accurate 3D trajectory. Through the 3D reconstruction method based on 2D trajectory fitting and projection iterative optimization, the tracking and depth estimation problem of high-speed tennis in the terminal with limited computing power can be effectively solved.

The application belongs to the technical field of signal high-speed acquisition and processing, and particularly relates to a kind of ocean absolute gravimetric metrology device interference signal high-speed acquisition and processing method, with NI PXIe-5172 digitizer as hardware, single-channel input mode is adopted, 14-bit resolution, 250MS / s sampling rate is set to collect interference signal;The collected signal is subjected to 128-tap FIR filtering processing of 5MHz-40MHz passband;Based on FPGA, multi-dimensional information fusion discrimination zero-crossing processing algorithm is realized, including double-sampling zero-crossing detection, local amplitude validity discrimination, timing consistency verification and comprehensive logic determination;Linear interpolation algorithm is used to calculate accurate time stamp for valid zero-crossing point;Combined with laser half-wavelength and time stamp sequence, the weighted least squares method is used to fit and solve the value of gravitational acceleration, and the standard deviation is calculated.

The invention provides an HUD curved mirror angle control method and system and a vehicle. The HUD curved mirror angle control method comprises the following steps: collecting a group of real-time accelerations output by a first accelerometer every a set period, and verifying the real-time accelerations, so as to obtain an actual acceleration based on a preset group of real-time accelerations when the verification is passed; obtaining the measurement angle of the curved mirror according to the actual acceleration and the gravitational acceleration, obtaining the parking inclination angle of the second accelerometer, and calculating the angle of the curved mirror based on the measurement angle and the parking inclination angle; and a driving motor of a curved mirror rotating shaft is further adjusted according to the curved mirror angle. According to the invention, closed-loop control is realized, and the curved mirror is rotated to a preset angle, so that the accuracy and stability of an imaging position are ensured, and the reliability and use value of the HUD are improved; and moreover, the HUD is not interfered by the environment and can stably work under the conditions of different temperatures, voltages and the like, so that the adaptability and the stability of the HUD in various complex environments are further improved.

The application discloses a high-precision time offset autonomous calculation method and system based on satellite speed v and gravity acceleration g. By establishing a closed correlation between the gravity field strength and the orbital speed, the traditional multi-parameter relativistic time correction model is simplified to a closed-form calculation depending on only two in-orbit measurable physical quantities, without the need for input of orbital radius, universal gravitational constant, earth mass, external ephemeris, etc. The application has outstanding originality, simple calculation, strong autonomy and reliable precision, can realize a daily cumulative time error of less than 1 ns, is suitable for low-orbit satellites, navigation satellites, constellation systems and various high-reliability time service scenarios, has a wide application range and high industrial value, and can significantly improve the autonomous time service capability of a spacecraft and the stability of a time system.

The application discloses a prestressed anchoring component generation method for end anchoring and lengthening anchoring, and belongs to the field of numerical calculation of roadway support. A grid model before roadway excavation is created by using FLAC3D; a constitutive model and material parameters are set for the grid model; boundary conditions are set for the grid model; gravity acceleration is set for the grid model; initial conditions are set for the grid model; a large deformation calculation mode is set; automatic solution is carried out on the grid model; part of the roadway in the grid model is excavated; anchoring component parameters are valued; the first row of anchoring components in the roadway is traversed; connection operation is carried out on the anchor unit nodes with ID 1; five material parameters are set for all the anchor units; two material parameters are set for the anchor units with ID 1 and ID 2; and automatic solution is carried out on the grid model again. The application has important significance for improving anchoring component generation efficiency and revealing the mechanical action principle between the anchoring component and the surrounding rock of the roadway.

The invention discloses a carbon dioxide geological sequestration simulation device and method, and belongs to the technical field of carbon sequestration simulation. The carbon dioxide geological sequestration simulation device comprises a model box, a simulation reservoir is arranged on the lower layer in the model box, and a simulation cover layer is arranged on the simulation reservoir; the carbon dioxide solution injection module is used for injecting a carbon dioxide solution into the simulated reservoir; the discharged liquid collecting module is used for collecting discharged liquid of the simulated reservoir; the temperature control module is used for controlling the temperature of the model box; the centrifugal module is used for providing gravitational acceleration for the model box; and the data acquisition module is used for detecting and acquiring changes of temperature parameters and pressure parameters of the simulated reservoir and the simulated cover layer. The simulation device provided by the invention simulates the geological storage of carbon dioxide, can observe the change conditions of a carbon dioxide solution in a reservoir and a cover layer under different years, different temperatures and different pressures, and provides support for long-time geological storage of carbon dioxide.

The invention belongs to the technical field of sensor measurement, and particularly relates to a drilling tool face angle and rotating speed measuring device and method for eliminating centrifugal force influence, the center of a rotating body of the drilling tool face angle and rotating speed measuring device is provided with axial slurry circulation, and two single-axis acceleration sensors are arranged on a mounting plane perpendicular to a central axis in the rotating body by taking the central axis as a reference. The distances from the sensing centers of the two sensors to the central axis are equal, and the connecting lines of the sensing centers of the two sensors and the central axis are perpendicular to each other. The sensitive axis directions of the two sensors are in the mounting plane, are perpendicular to the connecting line of the sensing center and the central axis, and are perpendicular to each other. According to the layout, the sensitive shafts of the sensor are all along the tangential direction of the mounting point, the radial centrifugal acceleration is'desensitized ', only the gravity acceleration component is responded, the interference of the centrifugal force generated by high-speed rotation on the measurement of the face angle and the rotating speed of a gravity tool is eliminated from the hardware level, and the problem that the sensor cannot be mounted at the axis due to the existence of a central channel is solved.

This invention discloses a multi-channel UAV pose perception system and method. The system includes a pose perception belt, a digital twin UAV attitude visual interface, and a UAV-side pose sensor. The pose perception belt includes a control unit, a wireless communication module, a vibration motor, a power supply module, and a belt frame. The UAV-side pose sensor collects UAV attitude data in real time and establishes an aerial attitude model of the UAV. The attitude data includes at least the angle and direction of UAV tilt. The angle of UAV tilt is defined as the tilt angle, which is the complementary angle γ between the UAV's XY plane and the ground. The direction of UAV tilt is defined as the drift angle, which is the angle α between the projection of gravitational acceleration on the UAV's XY plane and the X-axis. This invention significantly reduces the operator's cognitive load, enables rapid response to abnormal UAV attitudes, greatly shortens the operator's decision-making time, and reduces the risk of UAV loss of control, rollover, or crash.

An imaging apparatus can include an angle calculation unit configured to calculate attitude angles of a main body unit and a display unit from gravitational accelerations acquired from a first acceleration sensor and a second acceleration sensor, and switches a calculation method of the attitude angles to be calculated by the angle calculation unit based on a vibration state detected by a vibration detection unit.

The present invention relates to a method for determining the attitude shift of the sensor coordinate system of a vehicle (1) with respect to the vehicle coordinate system during the vehicle (1)'s driving operation in multiple iterations (IS1 to ISn). Each iteration (IS1 to ISn) includes actual measured values ​​(MW) of longitudinal acceleration and lateral acceleration determined by the inertial measurement unit (2), gravitational acceleration, state data necessary for calculating inertial force, and coefficients of a predetermined polynomial that represent the approximate relationship between the measured longitudinal acceleration and pitch angle (Φ), or between the measured lateral acceleration and roll angle (Θ). The inertial force is calculated in each iteration (IS1 to ISn), the measured values ​​(MW) of longitudinal acceleration and lateral acceleration are adjusted for contributions due to gravitational acceleration and inertial force, and the coefficients of the polynomial are updated with the adjusted measured values ​​of longitudinal acceleration and lateral acceleration. The iteration is terminated when each of the zero-order coefficients of the polynomial satisfies a predetermined convergence criterion, and the zero-order coefficients of the polynomial are output as a result of determining the attitude shift of the sensor coordinate system.

The application discloses a horizontal moving electromagnetic friction equivalent simulation test device, and belongs to the technical field of space and deep space exploration. The upper part of an electromagnetic sleeve is a sleeve piece with large flexibility. An electromagnet is arranged on the sleeve piece. The electromagnetic attraction force is changed by changing the current of the electromagnet, so that the deformation of the sleeve piece is affected to change the normal pressure of the sleeve piece on a vertical rod. The friction between the sleeve piece of the electromagnetic sleeve and the vertical rod is changed, and part of the gravity is offset to control the equivalent gravity. The lower part of the electromagnetic sleeve is a supporting piece. The edge of the supporting piece is a bolt hole. The bolt hole is connected with a test prototype. The current of the electromagnet at the upper end of the electromagnetic sleeve is controlled and adjusted in real time, so that the control and adjustment of the equivalent gravity are realized. The moving speed of a horizontal moving platform is controlled, so that the vertical drop shock and the horizontal speed coupling working condition are simulated. The accuracy and applicability of the equivalent gravity acceleration simulation test are improved.

The application provides a gravity acceleration measurement method and system based on YOLOv8, which comprises the following steps: labeling the pendulum position data in each picture in the pendulum picture data set to construct a corresponding pendulum labeling data set; taking the pendulum picture data set as the model input and synchronously taking the pendulum labeling data set as the label to train and fine-tune a preset YOLOv8 model to generate a corresponding pendulum detection model; based on the video frame rate and the video length, detecting the pendulum in the pendulum swing video through the pendulum detection model to output the center coordinates of the pendulum; normalizing the center coordinates of the pendulum and synchronously combining Fourier spectrum analysis to obtain the corresponding swing period, and calculating the corresponding gravity acceleration according to a preset formula and the swing period. The application can effectively improve the measurement accuracy.

The invention relates to the technical field of finite element simulation testing, in particular to a support hanger vibration stress state analysis method based on finite element analysis, which comprises the following steps: step 1, creating a three-dimensional model of a steam-water pipeline system comprising a support hanger; 2, finite element software is imported, a spring unit, thermal displacement boundary conditions and connection rigidity are finely defined, and a high-fidelity finite element model is established; 3, statics analysis and modal analysis are carried out, and stress, strain, inherent frequency and vibration mode under the action of gravitational acceleration, pipeline internal pressure, pipeline operation temperature and pipeline displacement load are obtained; and 4, based on the material strength and the vibration test frequency, judging the model precision and reliability, and if not, optimizing the model parameters. According to the method, boundary conditions and model parameters are finely defined, and verification and correction are performed by using experimental data, so that the simulation precision of the model is remarkably improved, and the model can be reliably used for identifying and analyzing the load of the support hanger.

The bran removing device comprises a bran removing body, a material uniformizing plate, an air inlet and an air outlet, the material uniformizing plate is arranged at the top of the bran removing body, the air inlet and the air outlet are located in the left side and the right side of the lower portion of the bran removing body respectively and connected with the bran removing body, the air inlet is designed to be externally hung with a shutter, and the air volume is adjustable; the air outlet is horn-shaped, and a slope is arranged at the lower end. According to the bran removing device disclosed by the utility model, by utilizing the gravitational acceleration of wheat, a material layer can be thinned by 1 / 3 of the original thickness within the height of 1.8 m, the particle spacing is increased, and the ventilation is improved, so that the impurity removing efficiency is improved; according to the compartment type bran removal device, the air speed is adjusted by adjusting the angle of a shutter, it is ensured that materials fall uniformly through the design of a material uniformizing plate at the top of the bran removal body, the wheat bran separation efficiency is effectively improved, and by optimizing the air duct design, the difficulty that air pressure penetrates through a material layer is reduced, and energy consumption is reduced.

The invention provides a human body motion capture system based on posture coordinates, and belongs to the technical field of human body motion capture, the system collects human body motion data through a sensor collection module, and carries out data denoising, error correction, gravitational acceleration removal and other processing on the collected data through a data processing module; the method comprises the following steps: optimizing a human body motion data acquisition effect, obtaining human body motion data close to reality, extracting human body motion characteristics based on the obtained human body motion data close to reality, carrying out classification identification on motions in combination with a support vector machine, realizing human body motion capture, and then carrying out reproduction through a motion 3D reproduction module. Therefore, the human body motion data can be preprocessed in time, the capturing effect is better, key information is prevented from being lost, and the key information can be visually reflected.