An Algorithm and Design for RFID Velocity Measurement Based on Least Square Method

2011 ◽  
Vol 317-319 ◽  
pp. 1573-1576
Author(s):  
Lin Ying Jiang ◽  
Heng Zhang ◽  
Han Qing Tan
Keyword(s):  
Great Degree ◽  
Velocity Measurement ◽  
Least Square Method ◽  
Least Square ◽  
Measuring System ◽  
Rfid Technology ◽  
Velocity Measuring ◽  
The Cost

This paper comes up with an algorithm and application for velocity measurement based on RFID technology. This measurement can reduce the cost of velocity-measuring system to a great degree, and improve the accuracy of velocity measurement on the basis of the algorithm.

A Study on Velocity Decay of φ6mm Tungsten Ball Fragment

2014 ◽  
Vol 1042 ◽  
pp. 154-158
Author(s):  
Chun Lin Yi ◽  
De Ren Kong ◽  
Yi Zhao Li ◽  
Li Ping Li ◽  
Jin Qiu Zhang ◽  
...  
Keyword(s):  
High Speed ◽  
Least Square Method ◽  
Least Square ◽  
Experimental Results ◽  
Measuring System ◽  
Low Speed ◽  
Velocity Decay ◽  
Velocity Attenuation ◽  
Attenuation Models ◽  
Velocity Measuring

In order to explore the velocity attenuation law and model of φ6mm tungsten ball fragment, theory analysis combined with tests is employed to study its velocity experimental results. First of all, a fragment velocity measuring system including 12 groups of cutting device is established. Then the attenuation experiments of φ6mm tungsten ball fragment in high speed and low speed velocity are performed by the measuring system. Based on the least-square method, MATLAB software is adopted to analysis the experimental data and obtained the high speed and low speed velocity attenuation models. The results show that φ6mm tungsten ball fragment speed attenuation coefficient is consistent in high speed and low. Thus, the analysis on velocity experimental results verifies that the established model is reasonable.

Subpixel Edge Detection Algorithm of the Glass Bottle Based on Zernike Moments

2011 ◽  
Vol 80-81 ◽  
pp. 1345-1349
Author(s):  
Hao Yang ◽  
Lei Pei
Keyword(s):  
Edge Detection ◽  
Fast Algorithm ◽  
Least Square Method ◽  
Threshold Value ◽  
Detection Algorithm ◽  
Zernike Moments ◽  
Least Square ◽  
Measuring System ◽  
Zernike Moment ◽  
Glass Bottle

The accuracy of edge detection determines the accuracy of actual dimension measurement，in order to improve the measuring accuracy, this paper proposes a fast algorithm of detecting the glass bottle dimension based on Zernike moments. Firstly, combines the traditional Zernike moment-based method with Otsu adaptive threshold algorithm and a new fast algorithm for edge detection is proposed. Then uses this fast algorithm to detect the edge of glass bottle with subpixel-level and uses the least square method to fit ellipses formed by the glass bottle mouth and bottom. Calibrated the system with standard gauge block and obtain the actual dimension at last. Experimental results show that the improved algorithm not only can make the edge detection reach the subpixel-level accuracy, but also can avoid the edge misidentification and inefficient causing by repeatedly manual adjustments to select the threshold value when detecting the edge. Making a rapid, accurate, non-contact measuring system becomes a reality.

Malaria and Pneumonia Effects on Rice, Vanilla Production and Rural Household Income In Madagascar: A Quantitative Study

2021 ◽  
Author(s):  
Marilys Victoire Razakamanana ◽  
Martine Audibert ◽  
Voahirana Tantely Andrianatoandro
Keyword(s):  
Least Squares ◽  
Quantitative Study ◽  
Household Income ◽  
Least Square Method ◽  
Rural Household ◽  
Least Square ◽  
Two Stage ◽  
Ordinary Least Square ◽  
Under Five ◽  
The Cost

Abstract Background: In Madagascar, malaria remains the leading cause of consultation and deaths at hospital at all ages and pneumonia is one of the main causes of the under-five mortality and account for 45% of children hospitalizations. The number of cases and deaths has not decreased during the last ten years. This paper aims to determine the effects of malaria and pneumonia on rice and vanilla production and income.Methods: We use data from survey lead by the authors on 975 households and 3,586 individuals of the SAVA region in the northeast of Madagascar. After checking the presence of endogeneity, ordinary least-square method was used instead of two-stage least squares.Results: Our results showed that malaria has no effect on production, and therefore does not affect income. Pneumonia has an effect on production of rice and vanilla. Moreover, the cost of malaria and pneumonia healthcare burdened by households affect their consumption. Conclusions: Therefore, pneumonia should be considered in the same way as malaria due to its effects on production and investment to fight against these two diseases must be strengthened in order to decrease the costs for the households.

Development of Measurement System for Accuracy Control in Subsection Manufacture

2008 ◽  
Vol 381-382 ◽  
pp. 79-82
Author(s):  
F. Zhang ◽  
Xing Hua Qu ◽  
J.F. Dai ◽  
S. Ye
Keyword(s):  
Least Square Method ◽  
Least Square ◽  
Measuring System ◽  
Large Radius ◽  
Accuracy Control ◽  
Data Processing Software ◽  
Geometrical Information ◽  
Cloud Points ◽  
Processing Software ◽  
Best Fit

The computer aided measuring system is established to evaluate geometrical information of the structure in subsection manufacture. The cloud points data of surface are collected by laser tracker so as to explore continuing data processing software and evaluate the error of dimension and shape, and then the real measuring model, matched by the corner information, is compared with CAD through the best-fit algorithm. The lack of fitting information which will cause the low measuring precision is solved by the least square method constrained by radius in structure with large radius and small central angle. As the research object, the tunnel structure is used in the quality control of manufacturers.

Design of Geometric Error Measuring System on a Miniaturized Machine Tool with Optics

2007 ◽  
Vol 364-366 ◽  
pp. 1215-1220 ◽  
Author(s):  
Wei Wang ◽  
Sung Hwan Kweon ◽  
Young Suk Kim ◽  
Seung Han Yang
Keyword(s):  
Machine Tool ◽  
Least Square Method ◽  
Geometric Error ◽  
Least Square ◽  
Measuring System ◽  
Geometric Errors ◽  
Motion Direction ◽  
Position Sensing ◽  
System Components ◽  
Configuration Simulation

Manufactured miniature parts conventional machine tools are substituted by mini-scale manufacturing system called miniaturized machine tool (mMT). However, calibration of mMT is extremely difficult due to its small dimensions. This paper presents a novel optical measuring system to measure integrated geometric errors namely a) three translation errors and b) three rotational errors. The squareness error between two moving axes was calculated by least-square method. These 7-DOF geometric errors were acquired simultaneously in one setup for each motion direction. The proposed measuring system consisted of two laser diodes, two beam splitters and three 2D position sensing detectors (PSDs). Configuration of this measuring system was proved by homogenous transformation matrix (HTM), and the relationship between PSD readings and geometric errors calculated by the algorithm were derived according to the configuration. Simulation were carried out to prove the validity of this algorithm. Sensitivity analysis based on mounting errors of system components is also presented in this paper. It is useful for further experiments in alignment of system components.

scholarly journals Measurement of reflection coefficient for a double-layered scaled model using the inverse filter

2021 ◽  
Vol 336 ◽  
pp. 01018
Author(s):  
Hao Song ◽  
Xiaowei Yan ◽  
Xiaochen Ma ◽  
Zixian Cui ◽  
Qi Li
Keyword(s):  
Reflection Coefficient ◽  
Pulse Signal ◽  
Least Square Method ◽  
Least Square ◽  
Experimental Results ◽  
Inverse Filtering ◽  
Inverse Filter ◽  
Scaled Model ◽  
Low Frequencies ◽  
The Cost

A method of measuring the reflection coefficient for a double-layered scaled model using the inverse filter is presented. First, the response of the circuit and underwater acoustical channel is measured, and the retransmitted inverse signal isestimated with the least square method for solving the cost function, which is constructed by the inverse filtering theory. Then, by retransmitting the inverse signal, the incident signal at the position of the double-layered scaled model is focused with high-main-lobe resolution, low side-lobelevel and a narrow pulse signal in temporal domain. The focus improves the measurement accuracy of the reflection coefficient for the double-layered scaled model in low frequencies. The feasibility of replacing the whole cylindrical with the double-layered scaled model is verified by simulation. The validity of the proposed method is verified by experiments carried out in a cylindrical tank for a double-layered scaled model at the frequency 0.5 kHz~10 kHz. The experimental results show that the proposed method is effective to the measurement of the reflection coefficient for the double-layered scaled model.The experimental results for the double-layered scaled model with acoustical coating on different shells have strongly directive significance for the process design and improvement of the acoustical coating.

Accurate Estimation of Phase Distribution on Reference Plane in Grating Projection Measurement

2005 ◽  
Vol 295-296 ◽  
pp. 221-226 ◽  
Author(s):  
M.R. Zhao ◽  
Yu Cheng Lin ◽  
X.B. Niu ◽  
D.M. Cheng
Keyword(s):  
Phase Distribution ◽  
Phase Error ◽  
Random Phase ◽  
Taylor Series Expansion ◽  
Least Square Method ◽  
Least Square ◽  
Measuring System ◽  
Reference Plane ◽  
Accurate Estimation ◽  
Rational Polynomial

A binary second order rational polynomial is adopted to simulate and extend the phase distribution on reference plane. In order to get the coefficients of the polynomial accurately, iterative least-square method based on the first order Taylor series expansion is used. The effect of the real reference plane profile error on measuring result is reduced by using extended unwrapped phase to substitute the original unwrapped phase. The effects of the random phase error and the system geometrical parameter error are decreased. The measuring accuracy of the system is improved. The principle of the 3D profile measuring system based on grating projection, the theoretic analysis for accurate estimate of phase distribution on reference plane, and the experimental results are presented.

Roundness Error Measurement of Shaft Parts Based on Virtual Instrument

2012 ◽  
Vol 591-593 ◽  
pp. 2595-2598
Author(s):  
Feng Guo Jiang ◽  
Bin Zhu ◽  
Yan Tao Wang ◽  
Peng Liu
Keyword(s):  
Virtual Instrument ◽  
Modular Design ◽  
Least Square Method ◽  
Least Square ◽  
Measuring System ◽  
Measuring Instruments ◽  
Roundness Error ◽  
Development Platform ◽  
Similar Product ◽  
Data Acquisition Card

Roundness error is widely measured in machinery industry, but existing roundness error measuring instruments have much weakness such as single function and low intelligent level, etc. Aimed at the shortage of traditional roundness error measuring instruments, the roundness error measuring system based on virtual instrument is developed. This system which takes NI LabVIEW8.5 as development platform, evaluates roundness error with the least square method, adopts modular design, combines with 610H IPC, PCI-1716 data acquisition card, stepping motors, LVDT sensor and other hardware can realize fast, precise measurement of roundness error of shaft parts. It is verified to be feasible by measuring standard parts. Compared with the similar product, this system has many advantages such as simple operation, intuitive display, high intelligent level and so on.

Prediction and Control of Prices for Livestock Meat

2014 ◽  
Vol 687-691 ◽  
pp. 5004-5007
Author(s):  
Wen Xi Duan ◽  
Mei Ling Liu
Keyword(s):  
Data Analysis ◽  
Cost Function ◽  
Least Square Method ◽  
Least Square ◽  
The Future ◽  
Prediction And Control ◽  
Microsoft Office ◽  
The Cost ◽  
And Control

The price of the livestock meat is the function of its demand quantity and its supply quantity.The cost function can be obtained by using the least square method or the data analysis of Microsoft Office EXCE. By the function, we can forecast the meat prices in the future. The raising quantity can appropriately be controlled using the cost function.

Development of Non-Contact Online Measuring System for Middle-Convex and Varying Ellipse Piston

2013 ◽  
Vol 753-755 ◽  
pp. 2282-2285
Author(s):  
Dong Zheng ◽  
Hui Xing Zhou ◽  
Han Wu ◽  
Chao Yang Zhang
Keyword(s):  
Digital Signal Processor ◽  
Digital Signal ◽  
Least Square Method ◽  
High Accuracy ◽  
Measured Data ◽  
Least Square ◽  
Measuring System ◽  
Displacement Sensor ◽  
Contour Error ◽  
Laser Displacement Sensor

A non-contact online measuring system is developed to measure the contour error of the middle-convex and varying ellipse piston. A high accuracy laser displacement sensor is used to measure the elliptical profiles of the piston, and a measuring collector is designed based on digital signal processor (DSP) TMS320F28335 to ensure strict correspondence between the angles and the radii data of the sampling points. The measured data is analyzed with least square method to calculate the contour error of the pistons cross section. The reliability of the measuring system is proved by experiment.

Sign in / Sign up

Export Citation Format

Share Document