scholarly journals The prototype of a thermoregulatory system for measurement and control of temperature inside prosthetic socket

2016 ◽  
Vol 40 (6) ◽  
pp. 751-755 ◽  
Author(s):  
Kamiar Ghoseiri ◽  
Yong Ping Zheng ◽  
Louis Lee Tat Hing ◽  
Mohammad Reza Safari ◽  
Aaron KL Leung
Keyword(s):  
Thermal Equilibrium ◽  
Thermal Inertia ◽  
Thermal Capacity ◽  
Residual Limb ◽  
Phantom Model ◽  
Prosthetic Socket ◽  
Thermoregulatory System ◽  
And Control ◽  
Measurement And Control

Background and aim: Thermal related problems with prostheses are common complaints of amputee people. This article aims to introduce a thermoregulatory technique as a potential solution for those problems in prostheses wearers. Technique: A smart thermoregulatory system was designed, manufactured, and installed on a phantom model of a prosthetic socket. It captured temperature data from 16 sensors positioned at the interface between the phantom model and a silicone liner and used their average for comparison with a defined set temperature to select required heating or cooling functions for thermal equilibrium. A thin layer of Aluminum was used to transfer temperature between thermal pump and different sites around the phantom model. Discussion: The feasibility of this thermoregulatory technique was confirmed by its ability to provide thermal equilibrium. Further investigations to improve the design of thermoregulatory system are necessary including temperature transfer element and power consumption based on thermal capacity and thermal inertia of the residual limb. Clinical relevance The smart thermoregulatory system by providing thermal equilibrium between two sides of a prosthetic silicone liner can control residual limb skin temperature and sweating. Consequently, it can improve quality of life in amputee people.

scholarly journals Measurement and analysis of parameters of the precise grinding system

2019 ◽  
Vol 254 ◽  
pp. 01012
Author(s):  
Krzysztof Tyszczuk ◽  
Kazimierz Peszyński ◽  
Adam Mroziński ◽  
Grzegorz Śmigielski
Keyword(s):  
Laboratory Tests ◽  
Pneumatic Conveying ◽  
Air Velocity ◽  
Measurement And Control System ◽  
Diet Supplements ◽  
Measurement And Analysis ◽  
And Control ◽  
Measurement And Control ◽  
Grinding System

The technological process of materials grinding, especially biological material with high oil content, is quite complex. There are several parameters that impact the performance and quality of the process (e.g. temperature, rotational speed). One of them is the air velocity at pneumatic conveying of grinding particles. The phenomena of pneumatic transport of seeds and its impact on product’s quality and grinding capacity is not methodologically recognized so far. The paper presents the construction details of measurement and control system and results of the research obtained during the laboratory tests. The results of the tests and their analysis will be used for design of a commercial precise grinder, which allowed to reach the optimum product’s capacity and quality, constituting the basis for biological diet supplements.

Design of Measurement and Control System for the Rail Fastening Spring Clip Type A and B

2011 ◽  
Vol 299-300 ◽  
pp. 1194-1197
Author(s):  
Yu Peng Yao ◽  
Ying Shi ◽  
Yong Ping Song
Keyword(s):  
Control System ◽  
Geometric Parameter ◽  
Type A ◽  
Geometric Parameters ◽  
Measuring Instrument ◽  
Measurement And Control System ◽  
And Control ◽  
Measurement And Control

The measurement and control system is designed to control the measuring instrument which measures the geometric parameters of rail fastening spring clips. The structure and work principle of the measurement and control system are presented. Nine geometric parameters of a rail fastening spring clip which is installed only one time can be measured atomically. The limited errors of measured parameters are largely smaller than one tenth of the geometric parameter tolerance. It only spends 40 seconds to measure a rail fastening spring clip. It improves the quality of the rail fastening spring clip production and ensures that it is safe and reliably used in railway.

scholarly journals Application of Laser Vibrometer to the Measurement and Control of Cable Tensile Forces in Cable-Stayed Bridges

2012 ◽  
Vol 8 (10) ◽  
pp. 810682 ◽  
Author(s):  
Cheol-Hwan Kim ◽  
Byung-Wan Jo ◽  
Jin-Taek Jun
Keyword(s):  
Tensile Force ◽  
Indirect Measurement ◽  
Laser Vibrometer ◽  
Data Logger ◽  
Long Span Bridges ◽  
Long Span ◽  
Tensile Forces ◽  
And Control ◽  
Measurement And Control

The tensile forces acting on the cable of long-span bridges are one of the most important factors since they reflect not only the structural stability of cables but also the overall quality of construction. Currently, indirect measurement using accelerometers attached to the surface of the cable is widely used to measure the natural frequency of cable. The frequency obtained from the accelerometer is converted to the tensile force of the cable. However, it sometimes requires many hazardous labors such as attaching the device on the surface of cable and wiring it with data logger, which could hinder the safety of workers during the erection of cables. In this study, a method using laser vibrometer is introduced to measure the tensile forces on cables at a distance. In addition, this study developed a unique postanalysis computer program that can calculate the tensile forces in real time. Compared with the values obtained from the accelerometers, the laser vibrometer system provided accurate and reliable matching.

Fluidic Flexible Matrix Composites for Volume Management in Prosthetic Sockets

2014 ◽  
Author(s):  
Melina Mercier ◽  
Corin Shirley ◽  
Shelby Stafford ◽  
Sydney Hitzke ◽  
Achu Byju ◽  
...  
Keyword(s):  
Matrix Composite ◽  
Soft Tissue Injuries ◽  
Residual Limb ◽  
Matrix Composites ◽  
Prosthetic Socket ◽  
Internal Fluid ◽  
Flexible Matrix Composite ◽  
Quality Of Fit ◽  
Made In

Persons with transfemoral and transtibial protheses experience changes in the volume of their residual limb during the course of the day. These changes in volume unavoidably lead to changes in quality of fit of the prosthesis, skin irritations, and soft tissue injuries. The associated pain and discomfort can become debilitating by reducing one’s ability to perform daily activities. While significant advancements have been made in prostheses, the undesirable pain and discomfort that occurs due to the volume change is still a major challenge that needs to be solved. The goal of this program is to develop smart prosthetic sockets that can accommodate for volume fluctuations in the residual limb. In this research, fluidic flexible matrix composite wafers (f2mc) are integrated into the prosthetic socket for volume regulation. The f2mc’s are flexible tubular elements embedded in a flexible matrix. These tubular elements are connected to a reservoir, and contain an internal fluid such as air or water. Fluid flow between the tubes and reservoir is controlled by valves. The f2mc’s can achieve more than 300% increase in volume and potentially several orders of magnitude of change in stiffness. Experimental results for a prosthetic socket demonstrate that the flexible matrix composite wafers can achieve changes in volume when pressurized.

scholarly journals Measurement Data Processing with the Use of Art Networks

2018 ◽  
Vol 28 (2) ◽  
pp. 186-195
Author(s):  
Maria Mrówczyńska ◽  
Jacek Sztubecki
Keyword(s):  
Measurement Data ◽  
Strong Impact ◽  
Resonance Theory ◽  
Adaptive Resonance ◽  
Control Networks ◽  
Vertical Displacements ◽  
Processing Measurement ◽  
And Control ◽  
Measurement And Control

Abstract ART (Adaptive Resonance Theory) networks were invented in the 1990s as a new approach to the problem of image classification and recognition. ART networks belong to the group of resonance networks, which are trained without supervision. The paper presents the basic principles for creating and training ART networks, including the possibility of using this type of network for solving problems of predicting and processing measurement data, especially data obtained from geodesic monitoring. In the first stage of the process of creating a prediction model, a preliminary analysis of measurement data was carried out. It was aimed at detecting outliers because of their strong impact on the quality of the final model. Next, an ART network was used to predict the values of the vertical displacements of points of measurement and control networks stabilized on the inner and outer walls of an engineering object.

Fabrication and application of an adjustable myoelectric transhumeral prosthetic socket

2019 ◽  
Vol 43 (5) ◽  
pp. 564-567 ◽  
Author(s):  
Jonathon S Schofield ◽  
Katherine R Schoepp ◽  
Michael Stobbe ◽  
Paul D Marasco ◽  
Jacqueline S Hebert
Keyword(s):  
Upper Limb ◽  
Residual Limb ◽  
Critical Factors ◽  
Myoelectric Prostheses ◽  
Prosthetic Socket ◽  
Electrode Contact ◽  
And Control ◽  
Critical Challenge

Background and Aim: Although upper limb myoelectric prostheses can offer improved functionality and dexterity over body-powered systems, abandonment rates remain high. User dissatisfaction in comfort and control are among the top contributors. The design of the prosthetic socket must be comfortable, while maintaining contact of control electrodes with the residual limb throughout the day. We present a myoelectric socket design that provides user-adjustable compression over electrode control sites to promote consistent control, while maintaining comfort and fit. Technique: A cable tensioning system was threaded through a series of paneled windows in the socket wall over electrode sites. Adjusting tension provided tuning of electrode contact. Discussion: A case study of a single transhumeral prosthetic user with a follow-up interview 11 months post delivery suggests that our adjustable design has the potential to address control and comfort challenges, critical factors in myoelectric prosthetic use, and abandonment. Clinical relevance Achieving consistent electrode contact with muscle control sites in traditional rigid sockets is a critical challenge for myoelectric prostheses. We present a unique solution via user-adjustable electrode contacts built into the socket.

Research of the On-Line Capacitor Measurement and Protection Device Based on STM32

2014 ◽  
Vol 945-949 ◽  
pp. 2641-2645
Author(s):  
Mao Fa Gong ◽  
Feng Qiu ◽  
Kai Li Song
Keyword(s):  
Reactive Power ◽  
Reactive Power Compensation ◽  
Control Device ◽  
Programming Algorithm ◽  
On Line ◽  
Line Loss ◽  
Compensation Device ◽  
And Control ◽  
Measurement And Control

It has great significance for the capacitor reactive power compensation device to improve the quality of the power system voltage and reduce the line loss. This paper proposes a reactive power compensation measurement and control device scheme that integrates reactive power compensation with microcomputer protection function, it also can cover the shortage of the microcomputer relay protection of parallel capacitor reactive power compensation system, the whole system is linked by the RS485 bus. The paper mainly introduces the hardware design around the STM32 series micro controller. And then introduce the design of the software on main programming algorithm of parameter measurement, communication protocol and capacitor protection configuration and the criterion of the major programming algorithm.

Preparation and Fundamental Research of Continuous Through-Porous Pure Aluminum Flat Pipes by Depoling Continuous Casting

2017 ◽  
Vol 898 ◽  
pp. 1220-1230
Author(s):  
Tao Zhang ◽  
Xue Feng Liu ◽  
Shan Shan Kong ◽  
Jia Jie Fan ◽  
Zhen Di Zhang
Keyword(s):  
Surface Roughness ◽  
Continuous Casting ◽  
Pure Aluminum ◽  
Cooling Water ◽  
Mold Temperature ◽  
Fundamental Research ◽  
Core Rod ◽  
And Control ◽  
Measurement And Control

Continuous through-porous pure aluminum flat pipes were prepared continuously by a self-developed depoling continuous casting technology. An online measurement and control of mold temperature at free end of graphite core rods was realized, which was critical for the preparation. The quality of flat pipes was characterized. The results show that the flat pipes could be successfully prepared with the following process parameters: melt with temperature of 750 °C, cooling water with temperature of 20 °C and flow volume of 400 L·h-1, heat insulating mattress with thickness of 2 mm, mold temperature ranged from 635°C to 655°C and continuous casting speed ranged from 1 mm∙min-1 to 4 mm∙min-1. The flat pipe had cross-section dimensions of 14 mm×5 mm, which was aligned unidirectional pore diameter of 3 mm, pore number of 3 and smooth internal and external surface. The pore surfaces of flat pipes became smoother with the reduction of the graphite core rod surface roughness. When the surface roughness of graphite core rods was 0.531 μm and 0.124 μm, the corresponding surface roughness of pores was 0.581 μm and 0.184 μm, respectively. The mold temperature at the free end of graphite core rods was kept at a low thermal temperature range which was 5~25 °C lower than the solidification point of pure aluminum that is necessary for stable depoling continuous casting.

Monitoring the quality of education in russian regions using information technologies

2020 ◽  
pp. 13-17
Author(s):  
E.A. Alexandrova ◽  
◽  
T.V. Karlova ◽  
Keyword(s):  
Information Technologies ◽  
Necessary Conditions ◽  
Quality Of Education ◽  
Digital Information ◽  
System A ◽  
Educational Processes ◽  
And Control ◽  
Measurement And Control ◽  
Objective Indicators

The article reveals the features of monitoring functions in education and its main models. In addition, the necessary conditions are considered not only for effective monitoring, but also for evaluating the quality of objective indicators. Special attention is paid to the intensive implementation of digital information technologies in the system of pedagogical measurements, including the possibility of studying educational processes in the online system. A number of positive aspects have been identified that facilitate measurement and control.

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