12results about How to "Eliminate precision issues" patented technology

The low-stress transfer and groove protection device comprises a supporting ring, a plug block, a lower cross-shaped support, a stand column, an upper cross-shaped support, an ejector rod and a lifting lug, the plug block is assembled in a groove in the supporting ring, the lower cross-shaped support is arranged in the supporting ring, the stand column is arranged at the upper end of the lower cross-shaped support, and the ejector rod is arranged at the lower end of the lower cross-shaped support. An upper cross-shaped support is arranged at the upper end of the stand column, an ejector rod is assembled in a through hole of the stand column, and a lifting lug is arranged at the upper end of the upper cross-shaped support; the cylinder structure installed in the groove of the supporting ring is positioned through the plug block, the ejector rod spirally extends to abut against the inner wall of the cylinder structure, the cylinder structure is made to be in linkage with the device, and then the cylinder structure is transferred by lifting the lifting lugs of the device. The device is easy to operate, convenient to disassemble, assemble and maintain and high in safety, welding of the cylinder structure is avoided, and the adverse effect that the cylinder structure deforms or the manufacturing precision is reduced due to assembling and welding of the lifting lugs is effectively eliminated.

The invention relates to an event-triggered neural network backstepping control method for a double-Duffing MEMS gyroscope with state constraint, and belongs to the technical field of MEMS gyroscope control. The method comprises the following steps: carrying out mathematical modeling on the dual-Duffing MEMS gyroscope, and introducing a digital signal processing (DSP) method to carry out dynamic analysis on the dual-Duffing MEMS gyroscope; in an event-triggered neural network backstepping controller, a tracking error, an acceleration function and an acceleration error of the event-triggered neural network backstepping controller are defined; designing a plurality of integral obstacle Lyapunov candidate functions, the control input of a controller and the adaptive rate according to the tracking error, the acceleration function and the acceleration error, estimating a nonlinear unknown function through a type 2 sequence fuzzy neural network, and solving the problem of virtual control rate differential item explosion through an acceleration second-order tracking differentiator; and establishing an event triggering mechanism based on a switching threshold strategy to assist the controller in performing event triggering neural network backstepping control. According to the method, the problems of chaotic oscillation, state constraint, uncertain interference, communication burden and the like in the system are solved.

The invention relates to the technical field of Hall sensor data correction, in particular to a Hall sensor array collaborative per-unit method and device and an angular position measurement method, and the method comprises the steps: firstly obtaining a plurality of first sampling value queues; dividing the plurality of sampling values of each first sampling value queue into two groups according to the sensor bias of the Hall sensor to obtain a plurality of first arrays and a plurality of second arrays; determining a plurality of sensor gains according to the plurality of first arrays and the plurality of second arrays, and determining a system gain and a system bias according to the plurality of sensor gains and the plurality of sensor biases; and finally carrying out per-unit processing on the plurality of target sampling values according to the system gain, the system bias, the plurality of sensor gains and the plurality of sensor biases to obtain a plurality of per-unit processing results. According to the method, the data returned by the Hall sensor queue is corrected by acquiring the system gain and the system bias, so that the influence caused by batch consistency and installation precision can be eliminated.

The invention discloses a shock wave CT inversion method and a rock burst early warning method based on active and passive double-source combination. The method comprises the following steps: 1, constructing a probability non-uniform initial velocity distribution model and a working face initial grid model of shock wave longitudinal waves and / or transverse waves; 2, travel time tomography forward modeling is carried out, and theoretical travel time and residual errors of theoretical longitudinal waves and / or transverse waves are calculated; 3, solving the gradient of the target function of the travel time residual; 4, carrying out seismic wave travel time tomography inversion, enabling the residual error and the RMS residual error to reach a stable state through the iterative adjustment of the seismic source and the velocity parameters of the longitudinal wave and / or transverse wave of the seismic wave, and outputting the final seismic source parameter and wave velocity; and 5, verifying the feasibility and accuracy of the inversion model through active CT numerical simulation, passive CT numerical simulation and active and passive double-source combined CT numerical simulation experiments. Working face wave velocity distribution obtained through inversion is more accurate, and the efficiency and accuracy of the shock wave CT technology are improved.

The present invention discloses a visualized airway management tool for the diagnosis and treatment of airway, mediastinum and lung tissue, the visualized airway management tool comprises a ventilation tube and an operation tube arranged side by side, wherein the ventilation tube is provided with a ventilation tube cavity extending in the length direction, and has a first opening at the distal end, the first opening extends across the tracheal carina, and a first inflatable cuff is provided near the first opening; the ventilation tube is also provided with a second inflatable cuff, the second inflatable cuff is located above the tracheal carina; the ventilation tube is provided with an image sensor below the second inflatable cuff and near the tracheal carina, the image sensor is used to capture images of its front end and the vicinity; the operation tube is provided with an operation tube cavity extending in the length direction, and has a second opening at the distal end; the operation tube is shorter than the ventilation tube, and the second opening of the operation tube is far away from the second inflatable cuff of the ventilation tube. The visualized airway management tool designed by the present invention significantly improves the accuracy and safety of the diagnosis and treatment operation of the multi-technique composite fiber bronchoscope, and fully guarantees the life safety of the patient.

The invention relates to the technical field of mechanical transmission, and provides a coupling capable of clamping different shaft diameters and invariable in rotational inertia, which comprises an upper jaw adjusting mechanism, a middle rotational inertia compensation mechanism and a lower jaw adjusting mechanism, the upper clamping jaw adjusting mechanism comprises a first chuck, a first plane gear ring and a plurality of adjusting units. The first plane gear ring sleeves the outer side of the first chuck; the multiple adjusting units are evenly distributed in the circumferential direction of the first chuck, and each adjusting unit is located in the radial direction of the first chuck. The adjusting unit comprises a first bevel gear, a first worm and a clamping jaw; the first bevel gear is meshed with the first plane gear ring; the first bevel gear is rigidly connected with the first worm; a threaded hole is formed in the clamping jaw, the first worm penetrates through the clamping jaw, and the first worm is meshed with the threaded hole of the clamping jaw. The clamping device can clamp rotating shafts with different shaft diameters, and it is guaranteed that the rotational inertia is not changed when the rotating shafts with the different shaft diameters are clamped.

This invention discloses an intelligent adaptive dose verification calculation method and system. The intelligent adaptive dose verification calculation method includes: obtaining preliminary dose distribution data for a patient based on a deep learning-based dose prediction model; dynamically assigning variance reduction parameters to particles in a Monte Carlo simulation based on the high and low dose distribution information in the preliminary dose distribution data, wherein the variance reduction parameters include simulation weights, with simulation weights assigned to particles predicted to be in high-dose regions being less than those assigned to particles predicted to be in low-dose regions; and using a Monte Carlo dose calculation engine, simulating the planned beam based on the dynamically assigned variance reduction parameters to obtain high-precision verification dose distribution data. This invention's intelligent adaptive dose verification calculation method ensures the physical authenticity of the final verification dose distribution and the credibility of the "gold standard."

The present invention discloses an airway management tool and a manufacturing method thereof, which can be used for the diagnosis and treatment of airways, mediastinum and lung tissues, etc., and comprises a ventilation tube and an operation tube arranged side by side, wherein the ventilation tube is provided with a ventilation tube cavity extending in the length direction, and has a first opening at the distal end, the first opening extends across the tracheal carina, and a first inflatable cuff is provided near the first opening; the ventilation tube is also provided with a second inflatable cuff, and the second inflatable cuff is located above the tracheal carina; the operation tube is provided with an operation tube cavity extending in the length direction, and has a second opening at the distal end, and the operation tube cavity serves as a passage for surgical diagnosis and treatment instruments to penetrate; the operation tube is shorter than the ventilation tube, and the second opening of the operation tube is away from the second inflatable cuff of the ventilation tube and is located 1-2 cm below the glottis. The airway management tool designed by the present invention significantly improves the accuracy and safety of the diagnosis and treatment operation of the multi-technique composite fiber bronchoscope, and fully guarantees the life safety of the patient.

The invention discloses a warning board processing method and device, a storage medium and electronic equipment, the method is applied to the field of metal detection, and the method comprises the following steps: sampling a target area through an eddy current detector to obtain original waveform data; performing interpolation processing on the original waveform data to obtain first waveform data; processing the first waveform data by adopting a complex modulation frequency spectrum refining algorithm to obtain first frequency spectrum data; metal information in the target area is determined according to the first frequency spectrum data, and installation of the warning board is controlled according to the metal information. According to the invention, the problem that the installation efficiency of a warning board is low due to the fact that the number of coils of a traditional eddy current type metal detector is limited and the traditional eddy current type metal detector is easily influenced by noise and interference in a complex environment in the prior art is solved.

This invention discloses a DC ultra-high voltage measurement sensor. The sensor includes a detection electrode, a shielding shell, an insulating layer, an ion current guiding electrode, and a core sensitive element. An installation space is provided inside the shielding shell, and the core sensitive element is disposed within the installation space. A sensing space is provided outside the shielding shell, and the detection electrode, insulating layer, and ion current guiding electrode are disposed within the sensing space. A pair of detection electrodes are correspondingly disposed on both sides of the sensing space. One end of the detection electrode is connected to the shielding shell through the insulating layer, and the other end of the detection electrode is connected to the ion current guiding electrode through the insulating layer. The ion current guiding electrode and the pair of detection electrodes semi-enclose the sensing space, with the ion current guiding electrode directly corresponding to and receiving the ion current. The core sensitive element is connected to the detection electrode via a wire. This sensor ensures the stability and reliability of the sensor during long-term operation in ultra-high voltage / ultra-high voltage DC environments.

The invention provides a stope filling roof contact monitoring device and method based on laser-ultrasonic dual modes, and relates to the technical field of mine filling mining. The monitoring device comprises a signal transmitting module and a signal receiving module, the signal transmitting module comprises an ultrasonic transmitting module and a laser transmitting module, and the signal receiving module comprises a laser receiver and an ultrasonic receiver. The monitoring method comprises the steps of installing the signal transmitting module and the signal receiving module, verifying the stability of a signal link, and monitoring by the monitoring device. According to the monitoring device and method, a laser mode and an ultrasonic mode are applied at the same time, the precise positioning characteristic of a laser signal and the global coverage capacity of an ultrasonic signal are utilized, the complementary monitoring advantage is formed, the blind area and the precision defect of single signal monitoring are effectively eliminated, and whole-course real-time uninterrupted judgment of the filling body roof contact state is achieved. The device adopts a modular design and installation mode, the underground operation process is greatly simplified, the filling operation quality and efficiency are improved, and reliable technical support is provided for filling operation.

The present invention relates to a brake clearance and clamping force control method and system of an electronic mechanical brake system. The system of the present invention comprises a self-learning module, an input arbitration module and a feedback arbitration module. The self-learning module is used for self-learning a critical absolute angle. The input arbitration module is used for selecting one of a reference absolute angle calculated by the self-learning module, a reference absolute angle converted by the brake clearance, and a reference absolute angle converted by the reference clamping force as input. The feedback arbitration module is used for selecting one of an actual absolute angle calculated by the absolute angle calculation module and an actual absolute angle converted by the actual clamping force as feedback. The present invention adopts a critical absolute angle self-learning method based on force feedback, which can improve the accuracy and consistency of critical absolute angle acquisition, and at the same time, can eliminate the influence of brake friction pad wear on clamping force control accuracy and response speed.