A High-Accuracy Calibration Method Using Sensor Sensitivity Difference for Piezoelectric Dynamometer

2019 ◽  
Vol 142 (1) ◽  
Author(s):  
Jun Zhang ◽  
Jun Shao ◽  
Zongjin Ren ◽  
Jing Yu ◽  
Xinyang Li ◽  
...  
Keyword(s):  
Piezoelectric Sensor ◽  
Calibration Method ◽  
Sensitivity Coefficient ◽  
High Accuracy ◽  
Test Accuracy ◽  
Real Time Control ◽  
Accuracy Measurement ◽  
Time Control ◽  
Sensor Sensitivity ◽  
Calibration Accuracy

Abstract High-accuracy measurement of force affects real-time control and process adjustment of industrial production. Piezoelectric sensor can be applied to measure force with the characteristics of high frequency and stiffness, great dynamic response and resistance to harsh conditions. As an important part of test, calibration determines sensitivity coefficient which directly affects test accuracy. To improve the calibration accuracy of offset loading force for multisensor piezoelectric dynamometer, a novel calibration method using sensor sensitivity difference is proposed in this paper. The calibration experiments of four sensors are performed to obtain the axial sensitivities and the force-to-electricity conversion coefficients. The multiple loading-point (MLP) calibration experiments of dynamometer are carried out, and the calibration results prove that the sensitivity difference of four sensors is the main reason affecting the calibration accuracy. The sensitivity difference calibration method (SDCM) is applied to the MLP calibration experiments, and the results show that the average resultant force deviations are reduced from 418.79 N (8.38% full scare (FS) to 24.16 N (0.61% FS) under a loading force of 5000 N, which proves high accuracy and reliability of SDCM. The calibration method will provide guidance for improving the calibration accuracy of dynamometer.

scholarly journals High-Accuracy Calibration Based on Linearity Adjustment for Eddy Current Displacement Sensor

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2842 ◽  
Author(s):  
Wei Liu ◽  
Bing Liang ◽  
Zhenyuan Jia ◽  
Di Feng ◽  
Xintong Jiang ◽  
...  
Keyword(s):  
Eddy Current ◽  
Measurement Accuracy ◽  
Characteristic Curve ◽  
Calibration Method ◽  
High Accuracy ◽  
Output Characteristic ◽  
Displacement Sensor ◽  
Support Vector ◽  
Displacement Sensors ◽  
Calibration Accuracy

High precision position control is essential in the process of parts manufacturing and assembling, where eddy current displacement sensors (ECDSs) are widely used owing to the advantages of non-contact sensing, compact volume, and resistance to harsh conditions. To solve the nonlinear characteristics of the sensors, a high-accuracy calibration method based on linearity adjustment is proposed for ECDSs in this paper, which markedly improves the calibration accuracy and then the measurement accuracy. After matching the displacement value and the output voltage of the sensors, firstly, the sensitivity is adjusted according to the specified output range. Then, the weighted support vector adjustment models with the optimal weight of the zero-scale, mid-scale and full-scale are established respectively to cyclically adjust the linearity of the output characteristic curve. Finally, the final linearity adjustment model is obtained, and both the calibration accuracy and precision are verified by the established calibration system. Experimental results show that the linearity of the output characteristic curve of ECDS adjusted by the calibration method reaches over 99.9%, increasing by 1.9–5.0% more than the one of the original. In addition, the measurement accuracy improves from 11–25 μ m to 1–10 μ m in the range of 6mm, which provides a reliable guarantee for high accuracy displacement measurement.

A New Calibration Method for Piezoelectric Testing System Based on Orthogonal Calibration Method

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Jun Zhang ◽  
Yu Han ◽  
Zongjin Ren ◽  
Jun Shao ◽  
Chuancun You ◽  
...  
Keyword(s):  
Piezoelectric Sensor ◽  
Calibration Method ◽  
Test System ◽  
Transformation Matrix ◽  
Load Test ◽  
Test Accuracy ◽  
Analysis Model ◽  
Force Detection ◽  
Force Coordinate ◽  
Method Accuracy

The accuracy of piezoelectric test system has a direct influence on the accuracy of the vector force detection. Piezoelectric sensor parameters are obtained by calibration system calibrated through orthogonal calibration method. Accuracy of the application of field test lacks the corresponding theoretical basis, resulting in test system test accuracy is questioned. In this paper, piezoelectric force test system is used as the research object. In order to verify accuracy of piezoelectric test system through calibration of orthogonal calibration method, a variable angle deflection loading device was designed. An incremental calibration method for thrust test is put forward by applying vector force at different angles. Based on vector force coordinate transformation matrix, a deflection load test and analysis model are established. The vector force coordinates transformation matrix is used to calculate the experimental data obtained from the deviation angle test system, and the deviation of the vector force value is obtained. Finally, the accuracy, effectiveness and rationality of piezoelectric test system through the orthogonal calibration method are verified.

Development of the Open Architecture Platform for Controller

2011 ◽  
Vol 268-270 ◽  
pp. 626-630
Author(s):  
Jun Mei Xi ◽  
Gao Hua Liao
Keyword(s):  
Intelligent Control ◽  
Fast Response ◽  
High Accuracy ◽  
Open Architecture ◽  
Real Time Control ◽  
Velocity Error ◽  
Time Control ◽  
Control Interface ◽  
Signal Wire ◽  
Machine Interface

At present，the open arehitecture controller and the field bus for motion control is a hotspot at home and abroad in the field of numerieal control system.This paper analyses the advantage of the typieal open arehitecture controller and improves.The open movement contro1 Platform based on BUS,which uses the open numrerieal control arehiteehire, that is，in order to control the system intelligently, We use a signal wire or optical fibre which connects all the drivers and the I/O port to transmit signals. In the system，all the control is operated by the up-pc machine，and the intelligent control nod is only used for communicating and translating the instruction.The control system uses Visual C# to empolder the up-pc software, and uses C to empolder the intelligent control interface. Experiments show that the system with the velocity error of less than 5%, the transition time of less than 0.1s, position error of less than 1mm. It can achieve not only the customization of the human-machine interface, and the parameterization of the real-time control parts, but also the exact travel path, the fast response, high accuracy positioning and other performance.

A NURBS Interpolator Using Multiprocessor on Chip for High Performance Motion Control

2011 ◽  
Vol 130-134 ◽  
pp. 1929-1932
Author(s):  
Wei Tang ◽  
Xiao Dong Zhang ◽  
Yong Ding ◽  
Jing Jing
Keyword(s):  
Motion Control ◽  
High Speed ◽  
High Performance ◽  
Experimental Tests ◽  
High Accuracy ◽  
Motion Controller ◽  
Real Time Control ◽  
Time Control ◽  
Nurbs Interpolation ◽  
On Chip

Modern CNC system adopts the NURBS interpolation for the purpose of achieving high-speed and high accuracy performance. However, in conventional control architectures, the computation of the basis functions of a NURBS curve is very time consuming due to serial computing constraints. In this paper, a novel multiprocessor-based motion controller on chip utilizing its high-speed parallel computing power is proposed to realize the NURBS interpolation. The motion control algorithm and I/O control are also embedded in the chip to implement real-time control and NURBS interpolation simultaneously. The experimental tests using an X-Y table verify the outstanding computation performance of the multiprocessor-based motion controller on chip. The result indicates that shorter sampling time (0.1 ms) can be achieved for NURBS interpolation and high-accuracy motion control.

Based on PLC and Intelligent Instruments Control System of Annealing Furnace

2013 ◽  
Vol 278-280 ◽  
pp. 1551-1554
Author(s):  
Bin Lu ◽  
Yan Wang ◽  
Cheng Lin Liu ◽  
Chang Ce Si
Keyword(s):  
Control System ◽  
Automatic Control ◽  
Real Time ◽  
Control Function ◽  
High Accuracy ◽  
Configuration Software ◽  
Annealing Furnace ◽  
Real Time Control ◽  
Smart Meters ◽  
Time Control

This document introducting a based on PLC and intelligent instruments control system of annealing furnace, the control system is on the basis of the PLC configuration software to monitor real-time control of smart meters, interchanging data between them, in order to achieve automatic control function together. Make the control system is safe and reliable, high accuracy [1].

A Design of Path Planning System for UP6 Industrial Robot Based on Machine Vision

2012 ◽  
Vol 591-593 ◽  
pp. 1418-1421 ◽  
Author(s):  
Shun Qing Xu
Keyword(s):  
Path Planning ◽  
Arc Welding ◽  
Industrial Robot ◽  
Calibration Method ◽  
Planning System ◽  
Real Time Control ◽  
Time Control ◽  
Offline Programming ◽  
Image Procession ◽  
High Repeatability

This paper introduces operational path planning system of visual industrial robot, which could be applied to arc welding, cutting and gluing. It depicts a calibration method of camera coordinate. It gains environmental messages via the method of image acquisition. It uses the method of image procession to process the signals acquired. It fulfills robotic real-time control and offline programming. Practice has proved that this system has high repeatability precision, which can meet the challenge of arc welding, cutting and gluing, and also meet the needs of production line.

Calibration method for high-accuracy measurement of long focal length with Talbot interferometry

2012 ◽  
Vol 51 (13) ◽  
pp. 2407 ◽  
Author(s):  
Xiaorong Jin ◽  
Jinchun Zhang ◽  
Jian Bai ◽  
Changlun Hou ◽  
Xiyun Hou
Keyword(s):  
Focal Length ◽  
Calibration Method ◽  
High Accuracy ◽  
Accuracy Measurement ◽  
Talbot Interferometry ◽  
High Accuracy Measurement

A Real Time Control Architecture for Continuously Managing Patients in a Care Unit

1995 ◽  
Vol 34 (05) ◽  
pp. 475-488
Author(s):  
B. Seroussi ◽  
J. F. Boisvieux ◽  
V. Morice
Keyword(s):  
Real Time ◽  
Linear Time ◽  
Treatment Plan ◽  
Control Architecture ◽  
Real Time Control ◽  
Time Representation ◽  
Time Control ◽  
Continuous Support ◽  
Definition Of ◽  
Computerized System

Abstract:The monitoring and treatment of patients in a care unit is a complex task in which even the most experienced clinicians can make errors. A hemato-oncology department in which patients undergo chemotherapy asked for a computerized system able to provide intelligent and continuous support in this task. One issue in building such a system is the definition of a control architecture able to manage, in real time, a treatment plan containing prescriptions and protocols in which temporal constraints are expressed in various ways, that is, which supervises the treatment, including controlling the timely execution of prescriptions and suggesting modifications to the plan according to the patient’s evolving condition. The system to solve these issues, called SEPIA, has to manage the dynamic, processes involved in patient care. Its role is to generate, in real time, commands for the patient’s care (execution of tests, administration of drugs) from a plan, and to monitor the patient’s state so that it may propose actions updating the plan. The necessity of an explicit time representation is shown. We propose using a linear time structure towards the past, with precise and absolute dates, open towards the future, and with imprecise and relative dates. Temporal relative scales are introduced to facilitate knowledge representation and access.

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