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.

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 MMIC on-Wafer Test Method Based on Hybrid Balanced and Unbalanced RF Pad Structures

Electronics ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 208
Author(s):  
Yue Bian ◽  
Yifan Gu ◽  
Xu Ding ◽  
Zhiyu Wang ◽  
Jiongjiong Mo ◽  
...  
Keyword(s):  
Integrated Circuit ◽  
Impedance Matching ◽  
Calibration Method ◽  
Test System ◽  
Test Method ◽  
Reference Plane ◽  
Calibration Error ◽  
Test Accuracy ◽  
Monolithic Integrated Circuit ◽  
Wafer Test

Nowadays, more and more MMICs (Microwave Monolithic Integrated Circuit), such as limiters and switches, are designed to have balanced and unbalanced test pad structures to solve the challenging size restrictions and integration requirements for MMICs. Hybrid balanced and unbalanced RF (Radio Frequency) probes are adopted for an on-wafer test of the heteromorphy structures. The thru standard based on single balanced or unbalanced structures cannot meet the impedance matching requirements of the hybrid RF probes at the same time, which leads to a dramatic decreasing of the calibration accuracy and cannot satisfy the requirement of MMIC test. Therefore, in this paper, the calibration error estimating of hybrid RF probes based on traditional SOLR (Short Open Load Reciprocal) calibration method is performed, and an on-wafer test approach of MMIC based on hybrid balanced and unbalanced RF probes is proposed which combines the OSL (Open Short Load) second-order de-embedding technique with vector error correction and the matrix transformation technique. The calibration reference plane can be accurately shifted to the probe tip with this method, which greatly improves the test accuracy, and an automatic test system is built for this method based on the object-oriented C# language.

A Transient Single Cylinder Test System for Engine Research and Control Development

2005 ◽  
Author(s):  
John L. Lahti ◽  
Matthew W. Snyder ◽  
John J. Moskwa
Keyword(s):  
Test System ◽  
Intake Manifold ◽  
Test Accuracy ◽  
Test Configuration ◽  
Single Cylinder ◽  
Cylinder Test ◽  
Single Cylinder Engine ◽  
Wide Range ◽  
Reduce Development Time ◽  
High Bandwidth

A transient test system was developed for a single cylinder research engine that greatly improves test accuracy by allowing the single cylinder to operate as though it were part of a multi-cylinder engine. The system contains two unique test components: a high bandwidth transient hydrostatic dynamometer, and an intake airflow simulator. The high bandwidth dynamometer is used to produce a speed trajectory for the single cylinder engine that is equivalent to that produced by a multi-cylinder engine. The dynamometer has high torque capacity and low inertia allowing it to simulate the speed ripple of a multi-cylinder engine while the single cylinder engine is firing. Hardware in loop models of the drivetrain and other components can be used to test the engine as though it were part of a complete vehicle, allowing standardized emissions tests to be run. The intake airflow simulator is a specialized intake manifold that uses solenoid air valves and a vacuum pump to draw air from the manifold plenum in a manner that simulates flow to other engine cylinders, which are not present in the single cylinder test configuration. By regulating this flow from the intake manifold, the pressure in the manifold and the flow through the induction system are nearly identical to that of the multi-cylinder application. The intake airflow simulator allows the intake runner wave dynamics to be more representative of the intended multi-cylinder application because the appropriate pressure trajectory is maintained in the intake manifold plenum throughout the engine cycle. The system is ideally suited for engine control development because an actual engine cylinder is used along with a test system capable of generating a wide range of transient test conditions. The ability to perform transient tests with a single cylinder engine may open up new areas of research exploring combustion and flow under transient conditions. The system can also be used for testing the engine under conditions such as cylinder deactivation, fuel cut-off, and engine restart. The improved rotational dynamics and improved intake manifold dynamics of the test system allow the single cylinder engine to be used for control development and emissions testing early in the engine development process. This can reduce development time and cost because it allows hardware problems to be identified before building more expensive multi-cylinder engines.

Design of an Intelligent Multi-Gyro Measurement Device

2005 ◽  
Vol 295-296 ◽  
pp. 589-594
Author(s):  
J.P. Wang ◽  
W. Zhou ◽  
W.F. Tian ◽  
Z.H. Jin
Keyword(s):  
High Speed ◽  
Dynamic Balance ◽  
Control Unit ◽  
Calibration Method ◽  
Test System ◽  
Measurement Device ◽  
Logic Control ◽  
Hardware Description ◽  
Thermal Resistors ◽  
Inertial Unit

This paper describes the design of an intelligent multi-gyro measurement device to measure and monitor an inertial unit composed of three dynamically tuned gyros (DTGs). A 16-bit microprogrammed control unit is programmed to fulfill the functions of signal processing, logic control and serial communication with a master computer. An FPGA, designed by using Verilog Hardware Description Language, is used to realize high speed 16-bit reversible counters for output pulses of the DTG digital dynamic balance circuits. The count values represent the angular motion of the inertial unit. A stepping electric bridge is employed to measure the resistance of thermal resistors within the gyros in a wide temperature environment. The resistance represents the working temperature of the gyros. An effective calibration method for the bridge is developed to eliminate the resistance measurement error. A test system is established to examine whether the device meets the user requirements. Results of the tests show that the device has a good performance. A trial use has proved that the device is stable and reliable and that it satisfies the demand of the user.

Application of data mining technology and wireless network sensing technology in sports training index analysis

2020 ◽  
Author(s):  
Liqiu Qian ◽  
Jiatong Liu
Keyword(s):  
Data Mining ◽  
Test Accuracy ◽  
Analysis Method ◽  
Sports Training ◽  
Analysis Model ◽  
Data Types ◽  
Mining Technology ◽  
Accuracy Test ◽  
Index Analysis ◽  
Sensing Technology

Abstract The conventional analysis method can provide a general analysis of sports training index, but its ability is relatively low when analyzing niche data. To solve this problem, this paper proposes data mining technology. First, the indicator parameter classification is determined, then the data mining technology is imported, the sports training analysis mechanism is established through this technology, and the construction of the index analysis model is completed. The model is used to analyze the process of niche data mining, and effective data of training indicators are obtained. Deep learning is a method of machine learning based on representation of data.Through the coverage test, accuracy test and immunity test, the variable parameters of the comprehensive analysis capability are determined. Further calculation of this parameter shows that the comprehensive ability of the data mining application analysis method is improved by 37.14% compared with the conventional method, which is suitable for analysis of niche sports training indicators of different data types.

Wear Prediction of Ball Screw Based on Adhesive Wear

2014 ◽  
Vol 635-637 ◽  
pp. 261-265
Author(s):  
Xiang Hong Xu ◽  
Yan Hui Wang ◽  
Dong Xu
Keyword(s):  
Adhesive Wear ◽  
Wear Behavior ◽  
Mechanical Efficiency ◽  
Test System ◽  
Ball Screw ◽  
Analysis Model ◽  
Wear Model ◽  
Systematic Analysis ◽  
Mechanics Model ◽  
Stabilization Condition

This paper aims to develop a new systematic analysis model to predict the wear of ball screw in stabilization condition. In order to investigate the wear behavior between the ball and raceway, a proper contact mechanics model should be established. Then, the wear model of ball screw based on Archard will be proposed and calculated by substituting the ball screw parameters. It has been proved that the effectiveness of the wear model on ball screw is verified through experiments in a specialized test system, which provides the theory basis of reasonably reducing the wear and improving the mechanical efficiency of a ball screw.

scholarly journals Analysis and Research on the Centimeter Band Receiver Amplitude Calibration Method

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Kai Wang ◽  
Maozheng Chen ◽  
Jun Ma ◽  
Xuefeng Duan ◽  
Yang Wang ◽  
...  
Keyword(s):  
Noise Temperature ◽  
Method Comparison ◽  
Calibration Method ◽  
Test Accuracy ◽  
Receiver Noise ◽  
Time Calibration ◽  
Test Platform ◽  
Calculation Results ◽  
Receiver Performance ◽  
Telescope System

The receiver is a signal receiving device in a radio telescope system. As an important parameter to characterize the receiver performance, noise temperature is very practical to calibrate accurately. The traditional receiver noise temperature calibration method is the cold and ambient load method. Through the establishment of K-band ambient receiver, and its amplitude calibration test platform of the cold and ambient load method, chopper wheel method, and ambient and hot load method, comparison and analysis of the above three methods were carried out. The test and calculation results show that the test accuracy of the cold and ambient load method is about 1.3%, that of the chopper wheel method (nonlow elevation) is about 3%, and that of the ambient and hot load method is about 9%. The test accuracy of the ambient and hot load method is slightly lower than that of the above two methods. The analysis is mainly due to the uncertainty of the hot load temperature and the small temperature difference between the two loads, which leads to the deterioration of the overall accuracy. But the advantage is that the method can perform real-time calibration in the process of observation, and it is easier to implement than the traditional cold and ambient load method. The results of noise temperature measurement are compared with those of theoretical calculation, the error is basically within 10%, and it can satisfy the demand of the noise temperature test. In the future, we expect that on the basis of increasing the hot load temperature, further experiments were carried out on the thermostatic treatment of hot load and the accuracy of temperature acquisition, and finally we hope that this method can better meet the testing requirements of receiver noise temperature and radio source amplitude calibration.

A STUDY ON THE EARTHQUAKE RESPONSE CHARACTERISTIC OF HYSTERESIS DAMPER USING SLY120 AND SS400

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2809-2814
Author(s):  
JAE HYOUK CHOI ◽  
RYOUICHI TAKISHITA
Keyword(s):  
Numerical Analysis ◽  
Vibration Suppression ◽  
Response Characteristic ◽  
Test System ◽  
Earthquake Response ◽  
Force Characteristic ◽  
Analysis Model ◽  
Loading Test ◽  
Restoring Force ◽  
Response Test

To examine earthquake response characteristics of hysteresis damper using SLY120 and SS400 steel panel damper, earthquake response test were performed. In this paper, restoring force characteristic of hysteresis damper which is obtained by loading test are assessed using numerical analysis model. A skeleton shift model, which has been used frequently in conventional analysis, is applied. Using a hybrid earthquake response test system, various characteristics of structural components that are difficult to model and to express mathematically are detected by test and incorporated into the computer system to promote numerical analysis of the whole system. In this research, hybrid earthquake response simulation of the linked vibration suppression structure is carried out, whereas hysteresis damper at the linked vibration control structure are selected as the actual loading test part and the peripheral frame is considered to be the virtual structure part.

The Calibration for Dual-Robot System Based on the Three-Point Method

2014 ◽  
Vol 998-999 ◽  
pp. 678-681 ◽  
Author(s):  
Min Xiu Kong ◽  
Guang Dong Yu
Keyword(s):  
Calibration Method ◽  
Transformation Matrix ◽  
Point Method ◽  
Robot System ◽  
System A ◽  
Calibration Problem ◽  
The Relationship

According to the calibration problem of the dual-robot system, a simple and quick calibration method is proposed in this paper. A new frame is established by the three non-collinear points which the robots handshake at. Then the transformation matrix between the first robot base frame and the new frame and the transformation matrix between the second robot base frame and the new frame will be known. After that, the transformation matrix between the two robots’ base frames will be calculated by the relationship between them. Then we simulate this algorithm in MATLAB to verify this method. After the simulation, we can find the validity of this calibration method.

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