Study of the metrological characteristics of the hydrostatic pressure sensor

Sensor Review ◽  
2019 ◽  
Vol 39 (5) ◽  
pp. 665-669
Author(s):  
Igor S. Nadezhdin ◽  
Aleksey G. Goryunov ◽  
Yuri G. Svinolupov ◽  
Olga J. Zadorozhnaya
Keyword(s):  
Hydrostatic Pressure ◽  
Pressure Sensor ◽  
Measurement Errors ◽  
Design Methodology ◽  
Content Type ◽  
Sensor Model ◽  
Operational Characteristics ◽  
Calibration Algorithm ◽  
The Mathematical Model ◽  
Maximum Minimum

Purpose The purpose of this paper is to develop a digital hydrostatic pressure sensor with the required metrological and operational characteristics. The developed sensor is designed to control hydrostatic pressure in wells during various geophysical works and studies. Design/methodology/approach To obtain the required metrological and operational characteristics of the sensor, a method was developed and applied to reduce the measurement error based on the calibration algorithm and the sensor model. Findings By using the developed calibration algorithm and the mathematical model of the sensor, it was possible to compensate for the measurement errors of the hydrostatic pressure sensor. Originality/value In the course of this research, tests of the developed sensor were carried and the maximum/minimum of measurement result errors was determined.

A deterministic inventory model in reverse supply chain

2019 ◽  
Vol 15 (1) ◽  
pp. 318-338 ◽  
Author(s):  
Sasmita Mohapatra ◽  
Ajay Kumar Behera ◽  
Rabindra Mahapatra ◽  
Harish Das
Keyword(s):  
Design Methodology ◽  
Current Model ◽  
Environmental Damage ◽  
Reverse Supply Chain ◽  
Retail Outlet ◽  
Present Value ◽  
Content Type ◽  
Unique Model ◽  
The Cost ◽  
The Mathematical Model

Purpose The purpose of this paper is to present a unique model for the production–recycling–reuse of aluminium refreshment cans. It is presumed that disposed-off 250-ml aluminium cans are collected from the retail outlet. The cans are thereafter arranged into non-tainted and tainted categories. Design/methodology/approach The current model considers all the factors, i.e. producing, recycling and remanufacturing, whereas the previous models provide emphasis only one factor. Six procedures were considered in the improvement of the mathematical model. Findings In this paper, a recycling–reuse model that remanufactures non-tainted aluminium beverage cans and uses regrind from damaged non-tainted aluminium beverage cans mixed with parent aluminium material in the production of new cans was developed and analysed to reduce the amount of aluminium beverage cans that are disposed off in a scrapyard. The model is assumed to have no shortcomings, and the different percentages regarding the classes of cans are taken to be deterministic. Originality/value The model incorporates several unique aspects, including accounting for the cost of land use and associated environmental damage through the calculation of a present value that is charged to the manufacturer.

Comfortable pressure feeling and clothing pressure on abdomen

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tamaki Mitsuno ◽  
Ayaka Kai Yanagisawa
Keyword(s):  
Hydrostatic Pressure ◽  
Body Surface ◽  
Design Methodology ◽  
Daily Basis ◽  
The Body ◽  
Body Parts ◽  
Elastic Band ◽  
Content Type ◽  
Clothing Pressure ◽  
Short Time

PurposeThe present study obtained the topography of perceptible (a perfect-fit feeling) clothing pressures from the chest to groin, when a stretching material provided hoop tension to the body surface of participants. Furthermore, the allowable pressure level was examined for the abdomen, which is pressed by underclothes on a daily basis.Design/methodology/approachParticipants were nine women aged 21.3 ± 1.2 years. Each participant's perception of pressure while wearing the experimental band was obtained in a questionnaire using a visual analog scale. Clothing pressure was measured employing a hydrostatic pressure-balancing method as participants adjusted the band length themselves to achieve two conditions: a perfect-fit and tight-fit on the abdomen.FindingsThe range of comfortable clothing pressure tightening provided by a 2.5 cm-wide elastic band on the abdomen was 0–5.6 hPa for under the bust, waist and groin, and 4.4–9.3 hPa for the chest, lower waist and hips. A nerve plexus of the autonomic nervous system and arteries are distributed over the body surface of the former body parts, which were thus sensitive to tightening around the abdomen.Originality/valueThe topography of perceptible clothing pressure was obtained when stretching material provided hoop tension to the body surface of the participant. The results of a participant questionnaire agreed with clothing pressure obtained using a hydrostatic pressure-balancing method that has a short-time constant and sensitive resolution. Furthermore, allowable pressure levels were proposed.

Overlapping optimization of hybrid deposited and micro-rolling additive manufacturing

2022 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Xushan Zhao ◽  
Yuanxun Wang ◽  
Haiou Zhang ◽  
Runsheng Li ◽  
Xi Chen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Design Methodology ◽  
Rolling Process ◽  
Weld Bead ◽  
Content Type ◽  
Profile Fitting ◽  
Overlapping Coefficient ◽  
Surface Flatness ◽  
The Mathematical Model ◽  
Bead Profile

Purpose This paper aims to summarize the influence law of hybrid deposited and micro-rolling (HDMR) technology on the bead morphology and overlapping coefficient. A better bead topology positively supports the overlapping deposited in multi-beads between layers while actively assisting the subsequent layer's deposition in the wire and arc additive manufacturing (WAAM). Hybrid-deposited and micro-rolling (HDMR) additive manufacturing (AM) technology can smooth the weld bead for improved surface quality. However, the micro-rolling process will change the weld bead profile fitting curve to affect the overlapping coefficient. Design/methodology/approach Weld bead contours for WAAM and HDMR were extracted using line lasers. A comparison of bead profile curves was conducted to determine the influence law of micro-zone rolling on the welding bead contour and fitting curve. Aiming at the optimized overlapping coefficient of weld bead in HDMR AM, the optimal HDMR overlapping coefficient curve was proposed which varies with the reduction based on the best surface flatness. The mathematical model for overlapping in HDMR was checked by comparing the HDMR weld bead contours under different rolling reductions. Findings A fitting function of the bead forming by HDMR AM was proposed based on the law of conservation of mass. The change rule of the HDMR weld bead overlapping spacing with the degree of weld bead rolling reduction was generated using the flat-top transition calculation for this model. Considering the damming-up impact of the first bead, the overlapping coefficient was examined for its effect on layer surface flatness. Originality/value Using the predicted overlapping model, the optimal overlapping coefficients for different rolling reductions can be achieved without experiments. These conclusions can encourage the development of HDMR technology.

Novel step-down topologies of star-connected autotransformer

Circuit World ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
JiaRong Wang ◽  
Bo He ◽  
XiaoQiang Chen
Keyword(s):  
Design Methodology ◽  
Voltage Regulation ◽  
Content Type ◽  
Harmonic Reduction ◽  
Modeling Analysis ◽  
Step Down ◽  
The Mathematical Model ◽  
Practical Implications ◽  
Theoretical Results ◽  
Equivalent Capacity

Purpose This paper aims to obtain a symmetrical step-down topology with lower equivalent capacity and wider step-down range under the condition of the same output. Two new symmetrical step-down topologies of star-connected autotransformers are proposed in this paper. Taking the equivalent capacity as the main parameter, the obtained topologies are modeled and analyzed in detail. Design/methodology/approach This paper adopts the research methods of design, modeling, analysis and simulation verification. First, the star-connected autotransformer is redesigned according to the design objective of symmetrical step-down topology. In addition, the mathematical model of two topologies is established and a detailed theoretical analysis is carried out. Finally, the theoretical results are verified by simulation. Findings Two symmetrical star-connected autotransformer step-down topologies are designed, the winding configurations of the corresponding topology are presented, the step-down ranges of these three topologies are calculated and the influence of step-down ratio on the equivalent capacity of autotransformer are analyzed. Through analysis, the target step-down topologies are obtained when the step-down ratio is [1.1, 5.4] and [1.1, 1.9] respectively. Research limitations/implications Because the selected research object is only a star-connected autotransformer, the research results may lack generality. Therefore, researchers are encouraged to further study the topologies of other autotransformers. Practical implications This paper includes the implications of the step-down ratio on the equivalent capacity of autotransformers and the configuration of transformer windings. Originality/value The topologies designed in this paper enable star-connected autotransformer in the 12-pulse rectifier to be applied in step-down circumstances rather than situations of harmonic reduction only. At the same time, this paper provides a way that can be used to redesign the autotransformer in other multi-pulse rectifier systems, so that those transformers can be used in voltage regulation.

MEMS piezoresistive pressure sensor with patterned thinning of diaphragm

2020 ◽  
Vol 37 (3) ◽  
pp. 147-153
Author(s):  
Zoheir Kordrostami ◽  
Kourosh Hassanli ◽  
Amir Akbarian
Keyword(s):  
Pressure Sensor ◽  
Design Methodology ◽  
Pressure Sensors ◽  
Mems Sensors ◽  
Sensors And Actuators ◽  
Content Type ◽  
Sensor Performance ◽  
Piezoresistive Pressure Sensor ◽  
Piezoelectric Pressure Sensor ◽  
First Time

Purpose The purpose of this study is to find a new design that can increase the sensitivity of the sensor without sacrificing the linearity. A novel and very efficient method for increasing the sensitivity of MEMS pressure sensor has been proposed for the first time. Rather than perforation, we propose patterned thinning of the diaphragm so that specific regions on it are thinner. This method allows the diaphragm to deflect more in response with regard to the pressure. The best excavation depth has been calculated and a pressure sensor with an optimal pattern for thinned regions has been designed. Compared to the perforated diaphragm with the same pattern, larger output voltage is achieved for the proposed sensor. Unlike the perforations that have to be near the edges of the diaphragm, it is possible for the thin regions to be placed around the center of the diaphragm. This significantly increases the sensitivity of the sensor. In our designation, we have reached a 60 per cent thinning (of the diaphragm area) while perforations larger than 40 per cent degrade the operation of the sensor. The proposed method is applicable to other MEMS sensors and actuators and improves their ultimate performance. Design/methodology/approach Instead of perforating the diaphragm, we propose a patterned thinning scheme which improves the sensor performance. Findings By using thinned regions on the diaphragm rather than perforations, the sensitivity of the sensor was improved. The simulation results show that the proposed design provides larger membrane deflections and higher output voltages compared to the pressure sensors with a normal or perforated diaphragm. Originality/value The proposed MEMS piezoelectric pressure sensor for the first time takes advantage of thinned diaphragm with optimum pattern of thinned regions, larger outputs and larger sensitivity compared with the simple or perforated diaphragm pressure sensors.

Tribological design of hydrodynamic sliding journal bearings – formulating new functional charts

2005 ◽  
Vol 57 (1) ◽  
pp. 4-11 ◽  
Author(s):  
C. Pandazaras ◽  
G. Petropoulos
Keyword(s):  
Design Methodology ◽  
Reynolds Equation ◽  
Journal Bearings ◽  
Content Type ◽  
Topographic Features ◽  
Operational Characteristics ◽  
Innovative Methodology ◽  
Limited Length ◽  
New Type

PurposeThis paper aims to introduce an innovative methodology for the determination of operational characteristics of journal bearings (j‐bs) through using new type charts based upon a numerical solution of the Reynolds equation.Design/methodology/approachThe present paper proposes the mapping of the behaviour of a smooth, isothermal and hydrodynamic (j‐b) as a first step towards a future representation of the behaviour of j‐b's with limited length and high lubricating clearance with or without macro or micro topographic features operating under high loads, high temperatures and low linear velocities leading to conditions of mixed or boundary lubrication.FindingsThe derived analytical relationships between dimensionless quantities lead to the development of high precision synthetic operational charts regarding sliding j‐b of any given geometry and varying operational characteristics.Originality/valueBy considering the iso‐operational curves which are of a hook form relevant to comparative data becomes directly and rapidly clarified.

A new method for the design of pressure sensor in hyperbaric environment

Sensor Review ◽  
2017 ◽  
Vol 37 (1) ◽  
pp. 110-116 ◽  
Author(s):  
Zhe Niu ◽  
Kui Liu ◽  
Hongbo Wang
Keyword(s):  
Pressure Sensor ◽  
Design Methodology ◽  
High Sensitivity ◽  
Measurement Range ◽  
New Method ◽  
Sensor Chip ◽  
Content Type ◽  
Hyperbaric Environment ◽  
Vital Parameters

Purpose The purpose of this paper is to introduce a new method for the design of a pressure sensor in the hyperbaric environment. Design/methodology/approach The new method focuses on two vital parameters that are closely related to the output and sensitivity of the sensor. The rectangular diaphragm structure is adopted, and the piezoresistors are planted on the surface accordingly. To verify the effect of the method, a contrastive sensor chip is fabricated in a conventional way, and two types of sensor chips are tested at the same time. Findings The new method for the design of a pressure sensor is advisable and favorable. The sensor fabricated by the method possesses outstanding high sensitivity and a wide measurement range. Originality/value This paper provides a new idea for increasing the measurement range of the pressure sensor with an acceptable sacrifice of sensitivity.

scholarly journals Digital image correlation for sensing kinematic fields in manufacturing processes: a review

2021 ◽  
Vol 2 (2) ◽  
pp. 37-62
Author(s):  
Pingan Zhu ◽  
Chao Zhang ◽  
Jun Zou
Keyword(s):  
Digital Image Correlation ◽  
Digital Image ◽  
Measurement Errors ◽  
Design Methodology ◽  
Measurement Accuracy ◽  
Intelligent Manufacturing ◽  
Image Correlation ◽  
Basic Principles ◽  
Content Type ◽  
Dic Technique

PurposeThe purpose of the work is to provide a comprehensive review of the digital image correlation (DIC) technique for those who are interested in performing the DIC technique in the area of manufacturing.Design/methodology/approachNo methodology was used because the paper is a review article.Findingsno fundings.Originality/valueHerein, the historical development, main strengths and measurement setup of DIC are introduced. Subsequently, the basic principles of the DIC technique are outlined in detail. The analysis of measurement accuracy associated with experimental factors and correlation algorithms is discussed and some useful recommendations for reducing measurement errors are also offered. Then, the utilization of DIC in different manufacturing fields (e.g. cutting, welding, forming and additive manufacturing) is summarized. Finally, the current challenges and prospects of DIC in intelligent manufacturing are discussed.

Ergonomic layout optimization of a smart assembly workbench

2018 ◽  
Vol 38 (3) ◽  
pp. 314-322 ◽  
Author(s):  
Shi-qing Wu ◽  
Bin Shen ◽  
Yun-zhe Tang ◽  
Jia-hai Wang ◽  
Da-teng Zheng
Keyword(s):  
Mathematical Model ◽  
Design Methodology ◽  
Optimal Solution ◽  
Layout Design ◽  
Layout Optimization ◽  
Content Type ◽  
Smart Assembly ◽  
Simulation Results ◽  
The Mathematical Model ◽  
Improved Algorithm

Purpose The purpose of this paper is to study a method to optimize the arrangement of the devices on a smart assembly workbench, which help to reduce fatigue and improve efficiency for the worker. Design/methodology/approach The optimization priority is studied based on the users’ decisions, a mathematical model of the layout optimization is established from ergonomic perspective and an improved algorithm is adopted to solve the built the mathematical model. Findings Ergonomic software Jack is chosen to simulate the four layout schemes obtained. Through comparative analysis of the simulation results, it is proven that the optimal solution can be obtained using the improved algorithm. Originality/value The mathematical model built on observation comfort, operation comfort and device accessibility, as well as the improved algorithm in this paper, has some reference values for the layout design of smart assembly workbench.

Novel symmetrical step-down topologies of zigzag autotransformer

Circuit World ◽  
2019 ◽  
Vol 45 (4) ◽  
pp. 231-256
Author(s):  
JiaRong Wang ◽  
XiaoQiang Chen
Keyword(s):  
Mathematical Model ◽  
Main Parameter ◽  
Design Methodology ◽  
Content Type ◽  
Modeling Analysis ◽  
Step Down ◽  
The Mathematical Model ◽  
Practical Implications ◽  
Theoretical Results ◽  
Equivalent Capacity

Purpose This paper aims to obtain a symmetrical step-down topology with lower equivalent capacity and wider step-down range under the condition of the same output. Three new symmetrical step-down topologies of zigzag autotransformer are proposed in this paper. Taking the equivalent capacity as the main parameter, the obtained topologies are modeled and analyzed in detail. Design/methodology/approach This paper adopts the research methods of design, modeling, analysis and simulation verification. First, the zigzag autotransformer is redesigned according to the design objective of symmetrical step-down topology. Second, the mathematical model of the designed topology is established, and the detailed theoretical analysis is carried out. Finally, the theoretical results are verified by simulation. Findings Three symmetrical zigzag autotransformer step-down topologies are designed, the winding configurations of the corresponding topology are presented, the step-down ranges of these three topologies are calculated and the influence of step-down ratio on equivalent capacity of autotransformer is analyzed. Through analysis, the target step-down topologies are obtained when the step-down ratio is [0.969, 1.414] and [1.414, 8]. Research limitations/implications Because the selected research object is only zigzag autotransformer, the research results may lack generality. Therefore, researchers are encouraged to further study topologies of other autotransformers. Practical implications This paper includes the implications of step-down ratio on the equivalent capacity of autotransformer and the configuration of transformer windings. Originality/value The topologies designed in this paper enable zigzag autotransformer to be applied in step-down circumstances.

Sign in / Sign up

Export Citation Format

Share Document