Study on the Engine Speed Sensor Position Measuring Tool Based on Minitab

2013 ◽  
Vol 456 ◽  
pp. 211-215
Author(s):  
Wu Cen ◽  
Li Xia Xia
Keyword(s):  
Measurement Accuracy ◽  
Engine Speed ◽  
Measurement Data ◽  
Measuring Method ◽  
Speed Sensor ◽  
Sensor Position ◽  
Accuracy Of Measurement ◽  
Repeatability And Reproducibility ◽  
Measuring Tool ◽  
Engine Size

Research on key position speed sensor of automobile engine size measuring tool as an example, for studying the optimization of measuring tools through use the powerful Minitab software statistics, analysis and calculation functions. Randomly selected 10 parts as a measurement sample, then obtained the measurement data by experiment. Analysis of the measured data with Minitab and calculate the repeatability and reproducibility of the device. Find the causes of failure in measuring and explore how to optimize the measuring method. Improved measuring clamp structure, and through experiments verify its feasibility. Thereby solving the problem of measuring failure to ensure the accuracy of measurement data, and improve the measurement accuracy of the product.

Detecting Thread Features Based on Digital Image Processing Techniques

2014 ◽  
Vol 889-890 ◽  
pp. 1107-1110
Author(s):  
Han Ming Cai ◽  
Pei Yao Wang ◽  
Xiao Mei Song
Keyword(s):  
Image Processing ◽  
Digital Image Processing ◽  
Digital Image ◽  
Measurement Accuracy ◽  
Measuring Method ◽  
Image Processing Techniques ◽  
Basic Image ◽  
The Cost ◽  
Processing Techniques ◽  
Gauge Measurement

Thread features of the traditional measuring method mainly adopts working gauge measurement, due to limitations in the traditional thread features measurement accuracy is relatively low, the efficiency is low, the cost is high. The thread features detection method based on digital image processing techniques using CCD to obtain basic image of thread, processing the thread image, extracting thread outline, calculating thread features through the computer, improves the efficiency, saves the cost.

Detection and Analysis of Rats’ Bioelectromagnetic Signal

2014 ◽  
Vol 536-537 ◽  
pp. 13-17
Author(s):  
Hong Long Cao ◽  
Fen Ju Qin ◽  
Xue Guan Liu ◽  
He Ming Zhao
Keyword(s):  
Standard Deviation ◽  
Automatic System ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Biological Activities ◽  
Measurement Data ◽  
Measured Data ◽  
The Mean ◽  
Frequency Window ◽  
Window Effects

In this paper, we designed an automatic system and automatic test software, and they can carry out Kunming rats bioelectromagnetic measurement in standard status and anesthesia automatically in anechoic chamber where the electromagnetic field outside is shielded, the reflection wave is absorbed, and the measurement accuracy will be improved. We get a great number of measurement data with frequency-sweep measurement method. The mean and standard deviation of amplitudes vs. frequencies is calculated and analyzed. The results show the measurement method is feasible. We have plotted the means of measured data as multiple sets of Y values in a series of bars with standard deviations bars included and distributed in the frequency axis of X. It is found that the fluctuation of the mean and standard deviation in some frequencies is not evident which may explain frequency window effects, while in other frequencies, such a fluctuation can be obviously observed, which may suggest that bioelectromagnetic signal is influenced by biological activities (standard and anaesthesia status) in these frequency points.

Signal Sampling and Accuracy Analysis of Large Gear’s Angular Displacement Measuring its Deviation On-Machine

2011 ◽  
Vol 189-193 ◽  
pp. 4201-4204
Author(s):  
Jia Qi Jin ◽  
Hui Li
Keyword(s):  
Measurement Accuracy ◽  
Angular Displacement ◽  
Total Error ◽  
Measuring Method ◽  
Displacement Measurement ◽  
Signal Acquisition ◽  
Accuracy Analysis ◽  
Friction Disc ◽  
Large Gear ◽  
Circular Grating

To solve the critical problem of large gear deviation on-machine: angle displacement measurement that is how to get signal acquisition and accuracy analysis of angle displacement. A new measuring method is proposed, which applies the dividing mechanism (it is composed of friction disc and circular grating) to ensure index and pick up signal of gear corner correctly and strictly according to the principle of angular displacement measurement. Furthermore, the main error which affects measurement accuracy is analyzed, and accuracy is analyzed with geometrical theory such as Fourier series and error synthesis principle etc. The experimental results indicate that angel dividing and signal samplings are easier and more efficient by the dividing mechanism, furthermore, the accuracy is in the range of total error that is permitted by verification, and the mechanism can also meet the requirement of high accuracy, so the method is significance that assessing transmission accuracy of involutes gear.

Research on Real-Time Measuring Method of Dynamic Deformation Based on Machine Vision and its Application

2011 ◽  
Vol 130-134 ◽  
pp. 3572-3576
Author(s):  
Li Zong Lin ◽  
Xiao Peng Ni ◽  
Luo Shan Zhou ◽  
Zhi Qin Qian
Keyword(s):  
Fatigue Strength ◽  
Machine Vision ◽  
Real Time ◽  
Dynamic Deformation ◽  
Measurement Data ◽  
Measuring Method ◽  
Strength Test ◽  
Time Deformation ◽  
Vision Measurement ◽  
Searching Method

Dynamic deformation measurement of machine parts in fatigue strength test is studied by using machine vision technique. Considering the uncertainty of parts surface, we adopt circular mark to locate the object profile in order to obtain high quality images. Through some image pre-processing with linear filtering, continuous contour searching method and circular detection based on random Hough transform (RHT), the real-time deformation can be measured with image characteristic parameters. In the practical application, the deformation of the loaded bicycle handle-bar is calculated. The test results show that the machine vision measurement is very effective; measurement resolution attains 0.1mm/pixel; the discrete degree of measurement data is low and the system meets the requirement of real-time measurement. The study proves that the measurement method of dynamic deformation based on machine vision is feasible, which can give some help for fatigue strength test of machine part and other structure deformation.

scholarly journals Performance optimization of ultrasonic flow meter based on computational fluid dynamics

2018 ◽  
Vol 10 (8) ◽  
pp. 168781401879326 ◽  
Author(s):  
Shanbi Peng ◽  
Wen Liao ◽  
Huan Tan
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Performance Optimization ◽  
Evaluation Method ◽  
Flow Meter ◽  
Rectification Effect ◽  
Ultrasonic Flow Meter ◽  
Accuracy Of Measurement ◽  
Nature Gas ◽  
Measuring Tool

As a common nature gas measuring tool, ultrasonic flow meter is more and more put into use. Therefore, the accuracy of measurement is what we concern the most. The performance of ultrasonic flow meter is closely related to fluid state which flows through it. This article identified the evaluation method of rectification effect of gasotron and its implementation steps. It proposed an assessing index Lmin based on dichotomy. Computational fluid dynamics method is used to simulate the model of an upstream straight pipe section with a header and plate gasotron, which obtained the assessing index Lmin in five different transmission conditions. Finally, the feasibility of the gasotron is validated against comparing indication errors in different installation conditions: with a header, benchmark, with a header and gasotron.

scholarly journals Compact Laser Collimation System for Simultaneous Measurement of Five-Degree-of-Freedom Motion Errors

2020 ◽  
Vol 10 (15) ◽  
pp. 5057
Author(s):  
Chuang Sun ◽  
Sheng Cai ◽  
Yusheng Liu ◽  
Yanfeng Qiao
Keyword(s):  
Simultaneous Measurement ◽  
Measurement Accuracy ◽  
Measurement Data ◽  
Optical Path ◽  
Degree Of Freedom ◽  
Experimental Setup ◽  
Collimation System ◽  
Optical Configuration ◽  
Series Of Experiments ◽  
The Common

A compact laser collimation system is presented for the simultaneous measurement of five-degree-of-freedom motion errors. The optical configuration of the proposed system is designed, and the principle of the measurement of five-degree-of-freedom errors is described in detail. The resolution of the roll and the horizontal straightness is doubled compared with other laser collimation methods. A common optical path compensation method is provided to detect light drift in real time and compensate for straightness and angle errors. An experimental setup is constructed, and a series of experiments are performed to verify the feasibility and stability of the system. Compared with commercial instruments, the pitch and yaw residuals are ± 2.5 ″ and ± 3.5 ″ without correction, and the residuals are ± 1.9 ″ and ± 2.8 ″ after correction, respectively. The comparison deviations of the horizontal straightness and vertical straightness changed from ± 4.8   μ m to ± 2.8 μm and ± 5.9 μm to ± 3.6 μm, respectively. The comparison deviation of the roll is ± 4.3 ″ . The experimental results show that the data of the five-degree-of-freedom measurement system obtained are largely the same as the measurement data of commercial instruments. The common optical path compensation can effectively improve the measurement accuracy of the system.

On-Machine Profile Measurement of Arc Grinding Wheel in 3-Axis Machine Using Non-Contact Displacement Sensor

2010 ◽  
Vol 37-38 ◽  
pp. 773-782
Author(s):  
Hao Huang ◽  
Xiang Yang Lei ◽  
Qiao Xu ◽  
Yin Biao Guo ◽  
Wei Luo
Keyword(s):  
Measurement Data ◽  
Measuring Method ◽  
Grit Size ◽  
Displacement Sensor ◽  
Grinding Wheel ◽  
Machining Accuracy ◽  
Profile Measurement ◽  
Shape Accuracy ◽  
Wheel Profile ◽  
Contact Displacement

Grinding is a processing method that involves duplicating shape accuracy, so the shape accuracy of the grinding wheel plays a crucial role in machining accuracy. However, this accuracy is difficult to obtain. This paper describes an on-machine wheel profile measuring method that uses a non-contact displacement sensor to obtain the shape accuracy of an arc grinding wheel in a 3-axis aspheric surface grinding machine. This method involves data processing with object radius confined filtering, as well as evaluation using the methods of fitting residual error, measurement uncertainty, and machining result simulation. To verify the feasibility of this measuring method, experiments were performed using two diamond grinding wheels (FEPA D91 with grit size 75-90 μm, and FEPA D15 with grit size 10-25 μm). The experimental results indicate that the method is accurate enough to give the arc grinding wheel profile measurement, while the measuring uncertainty is of the same order of magnitude as the grit size (that is, tens of μm). Moreover, the simulation of the grinding effect with wheel profile measurement data can derive the relationship between the wheel profile error and the machining form error, and can be used to instruct the truing time determination for precision grinding.

Continuous Monitoring of the Wheel-Rail Contact Vertical Forces by Using a Variable Measurement Scale

2020 ◽  
Author(s):  
Yu. P. Boronenko ◽  
R. V. Rahimov ◽  
Waail M. Lafta ◽  
S. V. Dmitriev ◽  
A. V. Belyankin ◽  
...  
Keyword(s):  
Fourier Series ◽  
Cross Sections ◽  
Continuous Monitoring ◽  
Measurement Accuracy ◽  
Continuous Measurement ◽  
New Technology ◽  
Measurement Data ◽  
Measurement Scale ◽  
Instantaneous Position ◽  
Variable Measurement

Abstract This paper presents a new technology of continuous measurement and recording of forces in wheel/rail contact by measuring strains in two rail cross-sections, which allows increasing the measurement accuracy. The method for processing the measurement data is proposed with a variable scale between strains and force, depending on the instantaneous position of the wheel with respect to a span between sleepers. The gage characteristics obtained by rolling a wheel over the rail between two sleepers are approximated by using Fourier series abilities and used for the assessment of wheel/rail forces. By using the suggested technology, the amount of information obtained increased 2 times.

Non-Intrusive Engine Speed Sensor

2007 ◽  
Author(s):  
Elias Taye ◽  
Thaddeus Schroeder
Keyword(s):  
Engine Speed ◽  
Speed Sensor

Two-Dimension Temperature Field Reconstruction in Furnace by Acoustic Method

2012 ◽  
Vol 249-250 ◽  
pp. 170-174 ◽  
Author(s):  
Li Na Jia ◽  
Yan Gao ◽  
De Cai Lu
Keyword(s):  
Temperature Field ◽  
Temperature Measurement ◽  
Measurement Data ◽  
Acoustic Method ◽  
Measurement Technology ◽  
Reconstruction Method ◽  
Two Dimension ◽  
Accuracy Of Measurement ◽  
Temperature Measurement System ◽  
Temperature Field Reconstruction

Acoustic temperature measurement technology is a new temperature measuring technology which is rising in recent years. This paper discusses a kind of reconstruction method of temperature field based on acoustic pyrometer. First , acoustic sensors has been used to obtain measurement data, and the technique of wavelet has been used to denoise in order to improve the accuracy of measurement , secondly, the least-squares algorithm has been used to reconstruct temperature field. Finally, we work out our own acoustic temperature measurement system and has got the satisfying result using our own acoustic pyrometer to detect two-dimension temperature field in the laboratory.

Sign in / Sign up

Export Citation Format

Share Document