scholarly journals Development of the Line Protection Measurement and Control Device based on Domestic MCU

2021 ◽  
Vol 2108 (1) ◽  
pp. 012017
Author(s):  
Chengxuan Zhao ◽  
Yuantao Wang ◽  
Chuankun Ni ◽  
Hu Chen ◽  
Yunlong Xu ◽  
...  
Keyword(s):  
High Precision ◽  
Control Device ◽  
Current Situation ◽  
Hardware Architecture ◽  
Acquisition System ◽  
Adaptive Processing ◽  
Design Scheme ◽  
Technical Specifications ◽  
And Control ◽  
Measurement And Control

Abstract In this paper, the dual MCU hardware architecture of protection measurement and control device was presented by analyzing the current situation of domestic MCU and chip selection. The problems existing in ADC sampling accuracy and ADC integral non-linearity were studied. The design scheme of high-precision ADC acquisition system based on dual MCU architecture was proposed, which could meet the requirements of technical specifications by using oversampling and adaptive processing of sampling nonlinear area. In terms of reliability, the EMC performance of the device was promoted by the improvement of outlet and ADC acquisition circuit.

ERRORS CONVERSION ON TRANSFER FUNCTIONS OF MEASUREMENT AND CONTROL

2021 ◽  
Vol 4 ◽  
pp. 92-104
Author(s):  
Valentin Bahatskyi ◽  
◽  
Aleksey Bahatskyi ◽  
Keyword(s):  
Transfer Functions ◽  
Systematic Errors ◽  
Step Function ◽  
Control Device ◽  
Point Of View ◽  
Correct Operation ◽  
Analog To Digital ◽  
Analog To Digital Conversion ◽  
And Control ◽  
Measurement And Control

Currently, the measurement of electrical and non-electrical quantities is performed using analog-to-digital conversion channels, which consist of analog signal conditioning circuits and analog-to-digital converters (ADC) of electrical quantities into a digital code. The paper considers the case when the defining errors of the measurement and control channel are systematic errors of the ADC. The reliability of measurements is assessed by their errors, and the reliability of control - by the likelihood of correct operation of the control device. In our opinion, evaluating the reliability of such similar processes as measurement and control using different criteria seems illogical. The aim of the work is to study the effect of systematic errors of an analog-to-digital converter on the errors of parameter control depending on the type of conformity functions and the width of the control window, as well as the choice of the resolution of the ADC for various control tasks. The paper analyzes the transfer functions of measurement and control. It is shown that they are formed using step functions. It is proposed to use not a step function as a control transfer function, but other functions of conformity to the norm, for example, a linear function or functions of higher orders. In this case, the control result is assessed not according to the criterion of the probability of correct operation, but using the control error. Analyzed from the point of view of reconfiguring the errors of the line, parabolic and state parabolic functions of the norms for the development of changes windows in control. A recommendation has been given for the selection of functions for the conformity of standards and for the distribution of analog-to-digital conversions for industrial control enterprises.

Measurement and Control Device of Preloaded Ball Screw Drive

2011 ◽  
Vol 486 ◽  
pp. 73-76
Author(s):  
Xue Feng Ma ◽  
Chao Hao ◽  
Fu Qiang Li
Keyword(s):  
Force Measurement ◽  
Control Device ◽  
Ball Screw ◽  
Automatic Compensation ◽  
Detail Design ◽  
Specific Device ◽  
Ball Screw Drive ◽  
And Control ◽  
Measurement And Control

The deviation often appears in the feeding device of machine because of the screw spindle geometry torsional moment and the wear. The automatic compensation of the changes was proposed by means of a ball screw pretightening device by using adjustable force measurement and control. The detail design and simulation were conducted for the specific device. A case study was presented for the CNC lathe’s application. Testing results have shown that the device can be easily operated with an acceptable precision for positioning.

Study on the System of Impact Test in Hydraulic Impact Machine

2010 ◽  
Vol 37-38 ◽  
pp. 1345-1350
Author(s):  
Qin Xu ◽  
Yuan Yue Huang
Keyword(s):  
High Precision ◽  
High Reliability ◽  
Dynamic Test ◽  
Impact Machine ◽  
Parallel Testing ◽  
Hydraulic Impact ◽  
Complex Process ◽  
The Stability ◽  
And Control ◽  
Measurement And Control

A new computer-aided control system was developed for the first time, by adopting parallel testing design ideas in this paper. It solved, both of hardware and software, in the industrial field of many interferential factors and the complex process of measurement and control, the problems in dynamic test as high- precision and high-reliability, such as synchronous acquisition of multi-parameter and data processing and so on. This achievement filled the gaps in this field. The test results showed that the stability and reliability and high precision of the system fully meet the requirement of measurement and control for hydraulic impact machine.

DC Protective Measurement and Control Device for Mass Transit Based on VxWorks

2014 ◽  
Vol 672-674 ◽  
pp. 1016-1021
Author(s):  
Qing Zhao Zeng ◽  
Jin Chuan Song ◽  
Su Zhuo Wu
Keyword(s):  
Hardware Implementation ◽  
Mass Transit ◽  
Control Device ◽  
Message Management ◽  
Technical Requirements ◽  
Implementation Scheme ◽  
Software And Hardware ◽  
Set Up ◽  
And Control ◽  
Measurement And Control

VxWorks operating system provides the technical foundation for the products development of DC protective measurement and control device for mass transit. According to technical requirements of products of DC protective measurement and control device for mass transit, this paper set up software and hardware implementation scheme and deeply analyzed the key technology such as task function division, message management, interrupt management and protection task realization.The successful application experience of this technology scheme has the guide meaning for the development of the similar products.

Multi-Structural Non-Linear Data Fusion Method

2014 ◽  
Vol 530-531 ◽  
pp. 554-560
Author(s):  
Zhi Hua Gong ◽  
Peng Wei Duan ◽  
Yong Guang Li ◽  
Rui Yue
Keyword(s):  
Data Fusion ◽  
High Precision ◽  
Control Mode ◽  
Hermite Function ◽  
Fusion Method ◽  
Trajectory Parameter ◽  
And Function ◽  
Trajectory Measurement ◽  
And Control ◽  
Measurement And Control

In systematic measurement and control mode composed of optics, radar and telemetry, trajectory measurement is in need of high precision. So, based on exterior trajectory parameter expressed by Hermite function, this paper proposes a multi-structure data fusion method with multisource heterogeneous measuring elements, which is called function restraint EMBET method. Based on the fusion simulation calculation and analysis of the same data of multisource heterogeneous measuring elements both using general EMBET method and function restraint EMBET method, it is proved that function restraint EMBET method is sensitive to errors, besides, it have the advantage of strong practicability and high precision.

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