scholarly journals Static Characteristics of a Linear Bipotentiometer Sensor

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Chang-Zhong Chen ◽  
Yong Cai ◽  
Tao Fan ◽  
Ping He
Keyword(s):  
Measurement Accuracy ◽  
Static Characteristics ◽  
Relative Load ◽  
Connection Method ◽  
Working Principle ◽  
Load Characteristics ◽  
Simulation Results

In this paper, the structure and the working principle of an existing linear potentiometer sensor are introduced; furthermore, the structure and circuit connection method of a new linear bipotentiometer sensor is proposed. The sensitivity, step error, and load characteristics of the existing potentiometer sensor and the linear bipotentiometer sensor are both studied and compared. The simulation results of their static characteristics show that the sensitivity of the linear bipotentiometer sensor is increased, the relative load error is greatly reduced, and the linearity is improved. Meanwhile, the measurement accuracy of the linear bipotentiometer sensor is effectively improved.

An Analysis on the Forming Load of AA 2024 Aluminium Alloy in Combined and Sequence Operation Process

2006 ◽  
Vol 519-521 ◽  
pp. 949-954 ◽  
Author(s):  
Beong Bok Hwang ◽  
J.H. Shim ◽  
Jung Min Seo ◽  
H.S. Koo ◽  
J.H. Ok ◽  
...  
Keyword(s):  
Finite Element ◽  
Load Capacity ◽  
Low Cost ◽  
Forming Load ◽  
Mechanical Press ◽  
Combined Operation ◽  
Aa 2024 ◽  
Load Characteristics ◽  
Simulation Results ◽  
Selection Of

This paper is concerned with the analysis of the forming load characteristics of a forward-backward can extrusion in both combined and sequence operation. A commercially available finite element program, which is coded in the rigid-plastic finite element method, has been employed to investigate the forming load characteristics. AA 2024 aluminum alloy is selected as a model material. The analysis in the present study is extended to the selection of press frame capacity for producing efficiently final product at low cost. The possible extrusion processes to shape a forward-backward can component with different outer diameters are categorized to estimate quantitatively the force requirement for forming forward-backward can part, forming energy, and maximum pressure exerted on the die-material interfaces, respectively. The categorized processes are composed of combined and/or some basic extrusion processes such as sequence operation. Based on the simulation results about forming load characteristics, the frame capacity of a mechanical press of crank-drive type suitable for a selected process could be determined along with securing the load capacity and with considering productivity. In addition, it is suggested that different load capacities be selected for different dimensions of a part such as wall thickness in forward direction and etc. It is concluded quantitatively from the simulation results that the combined operation is superior to sequence operation in terms of relatively low forming load and thus it leads to low cost for forming equipments. However, it is also known from the simulation results that the precise control of dimensional accuracy is not so easy in combined operation. The results in this paper could be a good reference for analysis of forming process for complex parts and selection of proper frame capacity of a mechanical press to achieve low production cost and thus high productivity.

Preliminary Study on the Effect of Operating Conditions on the Measurement Accuracy of Electronic Type Electric Energy Meter

2013 ◽  
Vol 834-836 ◽  
pp. 1246-1250
Author(s):  
Hai Bo Yu ◽  
Jia Liu ◽  
Chun Yu Wang ◽  
Li Li ◽  
Rui Ming Tong
Keyword(s):  
Measurement Accuracy ◽  
Reference Conditions ◽  
Electric Energy ◽  
Operating Conditions ◽  
Impulsive Load ◽  
Energy Meter ◽  
Power Frequency ◽  
Working Principle ◽  
Preliminary Study ◽  
Electric Energy Meter

The verification of electronic type electric energy meter is under strict reference conditions, but some special operating conditions at locale will exceed the standard scopes. In order to improve the calculation accuracy and operating reliability of electric energy meter under operating conditions, it is necessary to study the operating conditions. According to the working principle and the standard verification regulation of electronic type electric energy meter, this paper summarizes these operating conditions: low power factor, harmonic waves, dynamic impulsive load, voltage fluctuation and outside magnetic field of power frequency, then analyzes the causes of operating conditions and their influence on electronic type electric energy meter, eventually lays foundation for thorough and systematic study of electric energy meter in the operating conditions, and establishes measurement center database of operating conditions.

Development of a Novel High Voltage Cable Head Positioner for Scribing and Cutting

2014 ◽  
Vol 568-570 ◽  
pp. 355-358
Author(s):  
Fu Yun Zhu ◽  
Zhi Hui Lu ◽  
Hong Jun Ni ◽  
Xing Xing Wang
Keyword(s):  
High Voltage ◽  
Measurement Accuracy ◽  
Measurement Range ◽  
Ring Structure ◽  
Lower Grade ◽  
Working Principle

Principle of vernier caliper is a reference of the working principle of high voltage cable head positioner for scribing and cutting (HVCHPSC), considering the HVCHPSC is suitable for 35kV and below grade high voltage cable termination, the desired measurement range and position is 0-600mm and the measurement accuracy is 0.1mm of HVCHPSC are determined. According to the characteristics of production and installation process during 35kV and lower grade high voltage cable termination, identified the desired number of vernier on HVCHPSC is six, the required measuring span is 20mm. Designed and produced HVCHPSC, mainly constructed of a set of main scale and six sets of deputy ruler, each of which have a snap ring structure match with high voltage cable. Tests proved that the tool is easy to use, precise in positioning, well in performance.

scholarly journals Simulation Analysis of Magnetic Gradient Full-Tensor Measurement System

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Lei Xu ◽  
Ning Zhang ◽  
Liqing Fang ◽  
Huadong Chen ◽  
Pengfei Lin ◽  
...  
Keyword(s):  
Magnetic Dipole ◽  
Measurement System ◽  
Measurement Accuracy ◽  
Simulation Analysis ◽  
Magnetic Gradient ◽  
Measurement Systems ◽  
Magnetometer Array ◽  
Array Structure ◽  
Simulation Results ◽  
Planar Measurement

The magnetic gradient full-tensor measurement system is diverse, and the magnetometer array structure is complex. Aimed at the problem, seven magnetic gradient full-tensor measurement system models are studied in detail. The full-tensor measurement theories of the tensor measurement arrays are analyzed. Under the same baseline distance, the magnetic dipole model is used to simulate the measurement system. Based on different measurement systems, the paper quantitatively compares and analyzes the error of the structure. A more optimized magnetic gradient full-tensor measurement system is suggested. The simulation results show that the measurement accuracy of the planar measurement system is slightly higher than that of the stereo measurement system. Among them, the cross-shaped and square measurement systems have relatively smaller structural errors and higher measurement accuracy.

scholarly journals Different improvement designs of conventional comparator

2021 ◽  
Vol 2113 (1) ◽  
pp. 012008
Author(s):  
Xinmiao Fu ◽  
Miao He ◽  
Yuan Zhang
Keyword(s):  
Energy Consumption ◽  
Significant Role ◽  
Semiconductor Industry ◽  
Working Principle ◽  
Simulation Results

Abstract Comparators play a significant role in the semiconductor industry and have become indispensable in the design of ADC. The delay and energy consumption are two important indicators of the comparator. Many designs have been made to reduce the delay and energy consumption, such as separated gata-biasing cross-coupled transistors for a new latching stage, and pMOS is used to replace nMOS in comparators. This paper analyzes the working principle of the proposed comparators designed for different needs reported on different papers. It compares their simulation results about key data such as delay and energy consumption.

Resonator Optimization and Studying the Effect of Drive Ratio on the Theoretical Performance of a 10-W Cooling Power Thermoacoustic Refrigerator

2015 ◽  
Vol 23 (03) ◽  
pp. 1550020 ◽  
Author(s):  
B. G. Prashantha ◽  
M. S. Govinde Gowda ◽  
S. Seetharamu ◽  
G. S. V. L. Narasimham
Keyword(s):  
Dynamic Pressure ◽  
Optimization Procedure ◽  
Cooling Power ◽  
Pressure Amplitude ◽  
Performance Simulation ◽  
Resonator Design ◽  
Working Principle ◽  
Simulation Results ◽  
Theoretical Performance ◽  
Thermoacoustic Refrigerator

This paper deals with the basic insight of thermoacoustic refrigeration concepts, and the working principle, history and the role of linear thermoacoustic theory in designing a thermoacoustic refrigerator system are discussed. Resonator design optimization procedure for a 10W cooling power thermoacoustic refrigerators is discussed. The optimized resonator designs proposed in this paper are found to be efficient compared to published resonator designs. The effects of drive ratio on the theoretical performance by varying dynamic pressure amplitude from 0.2 bar to 0.4 bar in the steps of 0.05 bar on the optimized resonator designs are discussed. Performance simulation results for the optimized resonator designs using DeltaEC software are discussed. Simulation results are in agreement with theoretical results.

An All Optical OR Gate Using BPSK Technique Inside 2D Photonic Crystals

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Bahman Shahmohammadi ◽  
Alireza Andalib
Keyword(s):  
Phase Shift ◽  
Photonic Crystals ◽  
Destructive Interference ◽  
Two Dimensional ◽  
Phase Shift Keying ◽  
All Optical ◽  
Shift Keying ◽  
Working Principle ◽  
Simulation Results ◽  
Or Gate

AbstractIn this paper, we are going to design simulate an all optical OR gate based on two-dimensional photonic crystals. The proposed structure was designed based on phase shift keying technique. The working principle of the proposed structure is based on constructive and destructive interference of optical beams. The simulation results shows that the rise and fall times are 0.8 and 0.2 ps, respectively.

scholarly journals STUDI ANALISIS UFR (UNDER FREQUENCY RELAY) PADA GARDU INDUK PESANGGARAN

2019 ◽  
Vol 6 (2) ◽  
pp. 45
Author(s):  
Bhrama Sakti K.P. ◽  
A.A. Gede Maharta Pemayun ◽  
I Gede Dyana Arjana
Keyword(s):  
Power Plant ◽  
Power System ◽  
Electric Power ◽  
Recovery Time ◽  
Electric Power System ◽  
Calculation Results ◽  
Working Principle ◽  
Simulation Results ◽  
System Frequency ◽  
Frequency State

The disruption of the electric power system due to overcurrent causes a trip to the 3rd generator of pesanggaran power plant . This causes a decrease in frequency due to the system losing its supply. Frequency interference can be detected automatically with UFR (Under Frequency Relay). The working principle of UFR is to compare the value of the system frequency and the value of the frequency setting. The comparison will determine how much load is released to balance the generator supply. This study analyzes UFR performance at Pesanggaran Substation by simulating a case of the generator being released so as to produce a decreased system frequency state. The method used is by comparing the ETAP simulation results and calculation results. The results of the comparison obtained the system recovery time when the conditions (gen1 tripped), (gen1 and gen2 tripped), and (gen1, gen2, and gen3 tripped), each is 1.171s; 4,531s; and 4,514s.

Protection Window Pollution Interference of the Monodispersion Soot on Measuring SO2 Concentration Using NDIR

2012 ◽  
Vol 534 ◽  
pp. 289-292
Author(s):  
Yan Jun Zhao ◽  
Dong Xing Wang ◽  
Yi Chen Lu ◽  
Rui Kun Gong
Keyword(s):  
Sulfur Dioxide ◽  
Measurement Accuracy ◽  
Solution Method ◽  
Soot Particle ◽  
Infrared Absorption Spectrum ◽  
Concentration Measurement ◽  
Soot Particles ◽  
Sulfur Dioxide Concentration ◽  
Original Measurement ◽  
Simulation Results

The non-dispersive infrared absorption spectrum method is one of the important sulfur dioxide concentration measurement method. If the soot particles attach on the protection windows surface, the original measurement light intensity is attenuated because of the absorption and scattering of the soot particle and the sulfur dioxide concentration measurement accuracy is decreased. The protection window pollution question caused by the monodispersion soot particles is discussed in the paper. The numerical simulation results show that the sulfur dioxide concentration measurement accuracy is related to the protection window pollution. The solution method is brought out and the measurement accuracy can be improved.

An Improved FFT Algorithm and its Application in the Measurement of Grounding Resistance

2012 ◽  
Vol 546-547 ◽  
pp. 260-265
Author(s):  
Wen Yan Chen ◽  
Hang Tuo
Keyword(s):  
Measurement Accuracy ◽  
Measurement Precision ◽  
Resistance Measurement ◽  
Harmonic Amplitude ◽  
Frequency Method ◽  
Grounding Resistance ◽  
Amplitude Correction ◽  
Interference Signals ◽  
Simulation Results ◽  
Grounding Resistance Measurement

For the problems of noise and clutter interference in the measurement of grounding resistance, the article designs a grounding resistance measurement method based on an improved FFT algorithm. We deduce the harmonic amplitude correction formula which can more accurately measure the frequency of the interference signals and the amplitude of the effective signals, and thus improve the measurement accuracy of grounding resistance. This paper also devises a grounding resistance measurement scheme combining the algorithm and the variation-frequency method. The simulation results and the validation of experimental data show that, the algorithm evidently reduces the noise and improves the measurement precision. The algorithm is of high practical value to the grounding resistance measurement.

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