scholarly journals Signal Acquisition and Measurement System in Microwave Measuring Line Based on Compressed Displacement Sensor

2018 ◽  
Keyword(s):  
Measurement System ◽  
Displacement Sensor ◽  
Signal Acquisition ◽  
Measuring Line

scholarly journals Research on Temperature Compensation Method in Crankshaft Online Measurement System

2021 ◽  
Vol 11 (16) ◽  
pp. 7558
Author(s):  
Tingting Gu ◽  
Xiaoming Qian ◽  
Peihuang Lou
Keyword(s):  
Ambient Temperature ◽  
Measurement System ◽  
Temperature Compensation ◽  
Compensation Method ◽  
Displacement Sensor ◽  
Online Measurement ◽  
High Precision Measurement ◽  
Temperature Changes ◽  
Dragonfly Algorithm ◽  
Measuring Machine

The crankshaft online measurement system has realized the full inspection function with fast beats, at the same time it requires for high-precision measurement. Considering the effect of ambient temperature and temperature changes on measuring machine, the calibration part, the measured crankshaft and displacement sensor, a temperature compensation method is proposed. Firstly, relationship between calibration part and ambient temperature can be get through the zero calibration. Then use the material properties to obtain compensation values of the calibration part and the measured crankshaft part at different temperatures. Finally, the compensation parameters for displacement sensor can be obtained through the BP algorithm. The improved dragonfly algorithm (DA) is used to optimize the parameters of BP neural network algorithm. Experiments verify the effectiveness of IDA-BP for LVDT in temperature compensation. After temperature compensation, the error range of main journal radius is reduced from 0.0156 mm to 0.0028 mm, the residual error decreased from −0.0282 mm~+0.0018 mm to −0.0058 mm~−0.0008 mm. The influence of temperature changes on the measurement is reduced and measurement accuracy is improved through the temperature compensation method. The effectiveness of the method is proved.

A Development of Force Distribution Measurement System with High Resolution for Total Knee Arthroplasty

2014 ◽  
Vol 18 (2) ◽  
pp. 213-220 ◽  
Author(s):  
Mohd Hanafi Mat Som ◽  
◽  
Kouki Nagamune ◽  
Takashi Kamiya ◽  
Shogo Kawaguchi ◽  
...  
Keyword(s):  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Measurement System ◽  
Quantitative Information ◽  
Force Distribution ◽  
Signal Acquisition ◽  
Joint Stability ◽  
Rf Transceiver ◽  
Ligament Balancing ◽  
Total Knee

Soft tissue or ligament balancing in total knee arthroplasty is important for ensuring knee joint stability. Correct balancing and appropriate alignment of ligaments extend prosthesis life by preventing unnecessary force fromacting on the prosthesis during routine activities. The current implementation of total knee arthroplasty relies heavily on the subjective “feel” of the surgeon for correct prosthesis implantation onto tibiofemoral components. We developed a force distribution sensing systemto provide quantitative information to surgeons during ligament balancing. The measurement system consists of two main components: two force sensors embedded in trial insert for each condyle and signal acquisition for data processing and force visualization. Sensors were designed and developed using pressure-sensitive conductive rubber that measures changes in resistance in the event of deformation caused by external force. Corresponding voltage measured by circuits is transmitted via an RF transceiver to a computer and visualized as color gradient. Current sensors could measure maximum force of 196.13 N (20 kgf). Results from calibration and experiments on a plastic trial prosthesis indicated that the device has good potential for providing appropriate force distribution information on the knee during total knee arthroplasty procedure.

scholarly journals An underground three-dimensional displacement measurement system

2018 ◽  
Vol 232 ◽  
pp. 02053
Author(s):  
Yifeng Cheng ◽  
Qing Li ◽  
Nanying Shentu ◽  
Chao Zhang
Keyword(s):  
Measurement System ◽  
Tilt Angle ◽  
Group Structure ◽  
Three Dimensional ◽  
Horizontal Displacement ◽  
Vertical Displacement ◽  
Displacement Sensor ◽  
Monitoring Methods ◽  
Geological Disaster ◽  
On Line

With the development of society, the damage of geological disaster to people's life and property is more serious, so the improvement of monitoring means of geological disaster is particularly urgent, there are some shortcomings in traditional monitoring methods, and it is impossible to measure the three-dimensional displacement of underground. The authors have designed an integrated three-dimensional displacement sensor to measure underground horizontal displacement and vertical displacement and tilt angle, and realize the real-time on-line monitoring of underground three-dimensional displacement visually through multi-group structure co-measurement.

scholarly journals Base Detection Research of Drilling Robot System by Using Visual Inspection

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Zhanxi Wang ◽  
Jing Bai ◽  
Xiaoyu Zhang ◽  
Xiansheng Qin ◽  
Xiaoqun Tan ◽  
...  
Keyword(s):  
Coordinate System ◽  
Light Source ◽  
Measurement System ◽  
Visual Inspection ◽  
Displacement Sensor ◽  
Hole Drilling ◽  
Laser Displacement Sensor ◽  
Robot System ◽  
Visual Measurement ◽  
Drilling System

This paper expounds the principle and method of calibration and base detection by using the visual measurement system for detection and correction of installation error between workpiece and the robot drilling system. This includes the use of Cognex Insight 5403 high precision industrial camera, a light source, and the KEYENCE coaxial IL-300 laser displacement sensor. The three-base holes method and two-base holes method are proposed to analyze the transfer relation between the basic coordinate system of the actual hole drilling robot and the basic coordinate system of the theoretical hole drilling robot. The corresponding vision coordinates calibration and the base detection experiments are examined and the data indicate that the result of base detection is close to the correct value.

Research of Spindle Runout Testing Methods

2011 ◽  
Vol 121-126 ◽  
pp. 1455-1459 ◽  
Author(s):  
Yi Gao ◽  
Guo Hua Cao ◽  
Hong Ji Xu ◽  
Zheng Lin Yu
Keyword(s):  
Measurement System ◽  
Test System ◽  
Test Methods ◽  
Displacement Sensor ◽  
Sensor Calibration ◽  
Laser Displacement Sensor ◽  
Testing Methods ◽  
Calibration Experiment ◽  
Calibration Device ◽  
Machine Spindle

The paper aims at the analysis of machine spindle runout characteristics and designs of a laser displacement sensor in non-contact spindle runout measurement system. To ensure accuracy, we designed the laser displacement sensor calibration device, and the test calibration experiment was carried out by using laser displacement sensor. Experimental results showed that the test methods met the accuracy requirements of test system.

Online Measurement of Micro-Aspheric Surface Profile with Compensation of Scanning Error

2008 ◽  
Vol 381-382 ◽  
pp. 175-178 ◽  
Author(s):  
Yoshikazu Arai ◽  
Atsushi Shibuya ◽  
Y. Yoshikawa ◽  
Wei Gao
Keyword(s):  
Measurement System ◽  
Surface Profile ◽  
Displacement Sensor ◽  
Profile Measurement ◽  
Aspheric Surface ◽  
Contact Mode ◽  
Aspheric Surfaces ◽  
Sensor Unit ◽  
Ring Artifact ◽  
Linear Slide

A novel scanning probe measurement system has been developed to achieve precise profile measurements of micro-aspheric surfaces. The system consists of a scanning stage (a spindle and a linear slide) and a sensor unit. The sensor unit consists of a ring artifact, two capacitance sensors and a contact-mode displacement sensor. The two capacitance sensors scan the surface of the ring artifact to measure and compensate the error motions of the scanning stage while the contact-mode displacement sensor scans the surface of a micro-aspheric. In this paper, a new contact-mode displacement sensor that has a small contact force of less than 2.3 mN and a stable output has been developed. After investigating the fundamental performance of the contact-mode displacement sensor, the sensor has been applied to the micro-aspheric surface profile measurement system. The effectiveness of the measurement system has been verified by the measurement results.

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