A large quantity of steel balls automatic precise counting device based on dual sensor auto-correcting method

2021 ◽  
pp. 1-10
Author(s):  
Huadong Zou ◽  
Shengming Li ◽  
Ruiqing Jia ◽  
Zuming Li
Keyword(s):  
Low Voltage ◽  
Correction Method ◽  
Dual Sensor ◽  
Counting Device ◽  
Single Sensor ◽  
Pvc Pipe ◽  
Function Relationship ◽  
Steel Balls ◽  
Ball Detection ◽  
Voltage Jump

A large quantity of Steel Balls Automatic precise Counting device is introduced in this paper. Inductance sensors are used for ball detection and STC15F2K60S2 microprocessor is used to do the signal processing. When steel balls are sent to the PVC pipe at the same time, some balls will connect together because of the collision. The sensor will send a connected signal instead of multiple signals if it meets the connected balls. This could cause counting mistake of the device. A correction method is used to solve this problem. The device setup angle could be gotten by using dual sensors to get the average moving speed of the steel balls according to the fixed relations between the setup angle and the speed, which is not affected by whether the steel balls overlap or not because it used two voltage Jump edge to judge the start and end moment of timer. After that, the device setup angle is used to get the standard moving time to single sensor according to the known function relationship. The counting numbers are corrected by using the standard duration to compare with each recording low voltage duration passing single sensor. This method solves the counting mistake problem when a lot of steel balls are pushed into the PVC pipe together. The device improves the efficiency and accuracy of the ball counting.

Vibration Correction With Kalman Filtering Based Data Fusion for Absolute Gravimeters

2019 ◽  
Author(s):  
Yi Wen ◽  
Kang Wu ◽  
Zhenxing Li ◽  
Jiamin Yao ◽  
Meiying Guo ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Kalman Filtering ◽  
Ground Vibration ◽  
Free Fall ◽  
Vibration Signal ◽  
Correction Method ◽  
Fusion Method ◽  
Absolute Gravimeter ◽  
Single Sensor ◽  
Better Than

Abstract Free-fall absolute gravimeters are important classical high precision absolute gravimeters in many branches of scientific research. But its performance is always troubled by the ground vibration. Vibration correction method is used to correct the result by detecting the ground vibration with sensors. A Kalman filter based fusion method is proposed to obtain more accurate ground vibration signal by fusing the outputs of the seismometer and the accelerometer. Experiment is conducted with the homemade T-1 absolute gravimeter, the standard deviation of the corrected results using seismometer data and fused data are 586.32 μGal (1 μGal = 10−8 m/s2) and 508.59 μGal respectively, much better than the uncorrected result’s 6548.96 μGal. The results prove the superiority of fused data over data measured from single sensor. It is believed that the application scene of the vibration correction will be broadened and the performance of the vibration correction will also be improved by using the proposed fusion method in the future.

Design and Implementation of Vehicle Self-Navigation System in Urban Intelligent Traffic

2012 ◽  
Vol 241-244 ◽  
pp. 2107-2110
Author(s):  
Hong Zhu
Keyword(s):  
Navigation System ◽  
Dead Reckoning ◽  
Federal State ◽  
State Variables ◽  
State Estimator ◽  
System Equation ◽  
Dual Sensor ◽  
Global Positioning ◽  
Single Sensor ◽  
Linear And Nonlinear Systems

Compared with the single sensor measuring, the complementary measuring with the dual sensor can solve some key problems in the vehicle self-navigation system. Two sensors’ data must be fused by the federal state estimator. Based on the Singer model, the system equation of Dead Reckoning sensor is nonlinear and the system equation of Global Positioning System sensor is linear. A two-level estimator is designed and implemented in such a way that two local estimators process the linear and nonlinear systems respectively, and the main estimator fuses the data from two local estimators, so that the optimal global state variables can be estimated. The simulation results show that the two-level estimator of dual sensor can increase the vehicle’s self-navigation precision and can be applied in urban intelligent traffic.

scholarly journals Jaw Rotation in Dysarthria Measured With a Single Electromagnetic Articulography Sensor

2017 ◽  
Vol 26 (2S) ◽  
pp. 596-610
Author(s):  
Jeff Berry ◽  
Andrew Kolb ◽  
James Schroeder ◽  
Michael T. Johnson
Keyword(s):  
Speaking Rate ◽  
Movement Direction ◽  
Clinical Value ◽  
Orientation Data ◽  
Electromagnetic Articulography ◽  
Sensor Orientation ◽  
Dual Sensor ◽  
Orientation Method ◽  
Acquisition Costs ◽  
Single Sensor

Purpose This study evaluated a novel method for characterizing jaw rotation using orientation data from a single electromagnetic articulography sensor. This method was optimized for clinical application, and a preliminary examination of clinical feasibility and value was undertaken. Method The computational adequacy of the single-sensor orientation method was evaluated through comparisons of jaw-rotation histories calculated from dual-sensor positional data for 16 typical talkers. The clinical feasibility and potential value of single-sensor jaw rotation were assessed through comparisons of 7 talkers with dysarthria and 19 typical talkers in connected speech. Results The single-sensor orientation method allowed faster and safer participant preparation, required lower data-acquisition costs, and generated less high-frequency artifact than the dual-sensor positional approach. All talkers with dysarthria, regardless of severity, demonstrated jaw-rotation histories with more numerous changes in movement direction and reduced smoothness compared with typical talkers. Conclusions Results suggest that the single-sensor orientation method for calculating jaw rotation during speech is clinically feasible. Given the preliminary nature of this study and the small participant pool, the clinical value of such measures remains an open question. Further work must address the potential confound of reduced speaking rate on movement smoothness.

Dual-Sensor Based Robotic Deburring

1996 ◽  
Vol 118 (3) ◽  
pp. 439-441 ◽  
Author(s):  
G. M. Bone ◽  
M. A. Elbestawi
Keyword(s):  
Stainless Steel ◽  
Mild Steel ◽  
Cycle Time ◽  
Process Model ◽  
Force Sensor ◽  
Dual Sensor ◽  
Single Sensor

New results quantifying the performance of a vision and force sensor based robotic deburring system at high feedrates and on stainless steel parts are presented. The performance with stainless steel is similar to that achieved with mild steel due to adaptation of the process model. Increasing the feedrate from 25 mm/s to 50 mm/s did not greatly affect deburring performance and could be used to reduce cycle time. The dual-sensor approach is shown to be 14 times more reliable than a single sensor solution. The overall accuracy of the system is ±30 μm for straight edged parts, and ±60 μm for 2-d edged parts with geometry similar to those tested.

Blended dual sensor does not give additional benefits to single sensor in DDDR PM patients: Results from the DUSISLOG study

Heart Rhythm ◽  
2005 ◽  
Vol 2 (5) ◽  
pp. S40-S41 ◽  
Author(s):  
Paolo Pieragnoli ◽  
Andrea Colella ◽  
Eugenio Moro ◽  
Serafino Orazi ◽  
Maurizio Landolina ◽  
...  
Keyword(s):  
Dual Sensor ◽  
Single Sensor

Processing of human melanoma cells for correlative TEM, LVSEM, and LM

1991 ◽  
Vol 49 ◽  
pp. 106-107
Author(s):  
Marek Malecki ◽  
J. Victor Small ◽  
James Pawley
Keyword(s):  
Electron Microscopy ◽  
Low Voltage ◽  
Fluorescent Microscopy ◽  
Blood Stream ◽  
Surface Topology ◽  
Integrin Receptors ◽  
Transmission Electron ◽  
Develop Technology ◽  
Voltage Scanning ◽  
Mechanisms Of Adhesion

The relative roles of adhesion and locomotion in malignancy have yet to be clearly established. In a tumor, subpopulations of cells may be recognized according to their capacity to invade neighbouring tissue,or to enter the blood stream and metastasize. The mechanisms of adhesion and locomotion are themselves tightly linked to the cytoskeletal apparatus and cell surface topology, including expression of integrin receptors. In our studies on melanomas with Fluorescent Microscopy (FM) and Cell Sorter(FACS), we noticed that cells in cultures derived from metastases had more numerous actin bundles, then cells from primary foci. Following this track, we attempted to develop technology allowing to compare ultrastructure of these cells using correlative Transmission Electron Microscopy(TEM) and Low Voltage Scanning Electron Microscopy(LVSEM).

High-pressure freezing of cells in suspension for low-voltage scanning electron microscopy (LVSEM)

1991 ◽  
Vol 49 ◽  
pp. 64-65
Author(s):  
Marek Malecki ◽  
James Pawley ◽  
Hans Ris
Keyword(s):  
Electron Microscopy ◽  
High Pressure ◽  
Low Voltage ◽  
Culture Media ◽  
Cell Structure ◽  
Freeze Substitution ◽  
Ice Crystal ◽  
High Pressure Freezing ◽  
Cell Culture Media ◽  
Voltage Scanning

The ultrastructure of cells suspended in physiological fluids or cell culture media can only be studied if the living processes are stopped while the cells remain in suspension. Attachment of living cells to carrier surfaces to facilitate further processing for electron microscopy produces a rapid reorganization of cell structure eradicating most traces of the structures present when the cells were in suspension. The structure of cells in suspension can be immobilized by either chemical fixation or, much faster, by rapid freezing (cryo-immobilization). The fixation speed is particularly important in studies of cell surface reorganization over time. High pressure freezing provides conditions where specimens up to 500μm thick can be frozen in milliseconds without ice crystal damage. This volume is sufficient for cells to remain in suspension until frozen. However, special procedures are needed to assure that the unattached cells are not lost during subsequent processing for LVSEM or HVEM using freeze-substitution or freeze drying. We recently developed such a procedure.

Development of a conical anode Fe-gun for low voltage SEM

1988 ◽  
Vol 46 ◽  
pp. 978-979
Author(s):  
T. Miyokawa ◽  
S. Norioka ◽  
S. Goto
Keyword(s):  
High Resolution ◽  
Field Emission ◽  
Low Voltage ◽  
Irradiation Damage ◽  
Cold Cathode ◽  
Virtual Source ◽  
Source Position ◽  
Electrostatic Lens ◽  
Electrostatic Lenses ◽  
Wide Range

Field emission SEMs (FE-SEMs) are becoming popular due to their high resolution needs. In the field of semiconductor product, it is demanded to use the low accelerating voltage FE-SEM to avoid the electron irradiation damage and the electron charging up on samples. However the accelerating voltage of usual SEM with FE-gun is limited until 1 kV, which is not enough small for the present demands, because the virtual source goes far from the tip in lower accelerating voltages. This virtual source position depends on the shape of the electrostatic lens. So, we investigated several types of electrostatic lenses to be applicable to the lower accelerating voltage. In the result, it is found a field emission gun with a conical anode is effectively applied for a wide range of low accelerating voltages.A field emission gun usually consists of a field emission tip (cold cathode) and the Butler type electrostatic lens.

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