Inductive Sensor for Weighing of Mass

2011 ◽  
Vol 18 (2) ◽  
pp. 323-334
Author(s):  
Janusz Lewandowski
Keyword(s):  
Ambient Temperature ◽  
Strain Gauge ◽  
Electronic System ◽  
Constant Load ◽  
Load Cell ◽  
Measuring System ◽  
Main Element ◽  
Digital Correction ◽  
Inductive Sensor ◽  
Inductive Measuring

Inductive Sensor for Weighing of Mass A new method measuring of mass in electronic system of scales has been described. The main element of this system is inductive measuring load cell, which was compared with strain gauge load cell. The aim of the paper is described advantages of the inductive measuring system of mass and explain some main problems of this system. Digital correction of the mechanical errors of the beam like: hysteresis, creep material of the beam under constant load, influence of ambient temperature was described.

scholarly journals DESIGN OF UNDIRECT GUY WIRE TENSION METER BASED ON STRAIN GAUGE

2019 ◽  
Vol 13 (2) ◽  
pp. 111-120
Author(s):  
Agus Sasmito ◽  
Yudi Irawadi
Keyword(s):  
Tensile Stress ◽  
Design Process ◽  
Mathematical Analysis ◽  
Strain Gauge ◽  
Bending Moment ◽  
Load Cell ◽  
Wire Tension ◽  
Main Component ◽  
Design Result ◽  
Data Result

The safety of the tower is depend the tension of guy wire, where it must have the same tensile stress at all positions. To meet this requirement, the load cell guy wire is designed based on strain gauge. Load cell guy wire  is designed portable and it can detect stress of the guy wire indirectly. The main component of load cell is a beam, two hooks and a cylinder to form a bending moment force in the beam, the value of the bending moment on the beam will be directly proportional to the increase or decrease in force drag on guy wire. Design process of load cell doone using mathematical analysis, and then the load cell is calibrated by standard load cell, based on the data result of calibration is known that the stress at the guy wire load cell is close and under the yield stress of the load cell material, it is proved that load guy wire cell’s design result is safe to use.

scholarly journals Peculiarities in Leidenfrost water droplet evaporation

2020 ◽  
Author(s):  
Tadeusz Orzechowski
Keyword(s):  
Surface Temperature ◽  
Orthogonal Projection ◽  
Water Droplet ◽  
Linear Time ◽  
Heating Surface ◽  
Droplet Evaporation ◽  
Measuring System ◽  
Main Element ◽  
Bottom Surface ◽  
Good Representation

Abstract The investigations involved a large water droplet deposited on the heating surface, the temperature of which was higher than the Leidenfrost point. The main element of the experimental setup was the heating cylinder with K-type shielded thermocouple located in its centre just below the surface. The measuring system was located on highly sensitive scales. The analysis of the droplet behaviour in time was conducted based on measured droplet mass changes over time and also photographic data recorded with high resolution digital camera. The energy balance equation is given for the assumption that evaporation from the droplet upper surface is small compared with the amount of heat dissipated from the bottom surface. The formula for the heat transfer coefficient depends on two slope values and an orthogonal projection of the drop onto the heating surface. The slopes are estimated based on the droplet diameter linear time dependence and mass versus the contact zone relationship. The solution provides a good representation of droplet evaporation under Leidenfrost conditions. The investigations, reported in the study, which concern water droplet at atmospheric pressure deposited on a hot surface with the temperature higher than the Leidenfrost point, indicate the following regularities: droplet orthogonal projection onto the heating surface changes linearly with the droplet mass, evaporation of the same amount of mass decreases linearly with an increase in the heating surface temperature, slope of the graph showing mass loss versus the heating surface temperature successively decreases.

A constant-load ergometer for measuring peak power output and fatigue

1988 ◽  
Vol 65 (5) ◽  
pp. 2343-2348 ◽  
Author(s):  
J. H. Williams ◽  
W. S. Barnes ◽  
J. F. Signorile
Keyword(s):  
Power Output ◽  
Peak Power ◽  
Intraclass Correlation ◽  
Average Power ◽  
Load Cycle ◽  
Constant Load ◽  
Load Cell ◽  
Peak Power Output ◽  
Maximal Power Output ◽  
Power Curves

A constant-load cycle ergometer was constructed that allows maximal power output to be measured for each one-half pedal revolution during brief, high-intensity exercise. To determine frictional force, an electronic load cell was attached to the resistance strap and the ergometer frame. Dead weights were attached to the strap's free end. Flywheel velocity was recorded by means of a magnetic switch and two magnets placed on the pedal sprocket. Pedaling resulted in magnetically activated switch closures, which produced two electronic pulses per pedal revolution. Pulses and load cell output were recorded (512 Hz), digitized, and stored on disk via microcomputer. Power output was later computed for each pair of adjacent pulses, representing average power per one-half pedal revolution. Power curves generated for each subject were analyzed for peak power output (the highest one-half pedal revolution average), time to peak power, power fatigue rate and index, average power, and total work. Thirty-eight males performed two 15-s tests separated by 15 min (n = 16) or 48 h (n = 22). Peak power output ranged from 846.0 to 1,289.1 W. Intraclass correlation analysis revealed high test-retest reliability for all parameters recorded on the same or different days (R = 0.91-0.97). No significant differences (P greater than 0.05) were noted between parameter means of the first and second tests. These results indicate that the ergometer described provides a means for conveniently and reliably assessing short-term power output and fatigue.

scholarly journals Application of the Non-Contact Video Gauge on the Mechanical Properties Test for Steel Cable at Elevated Temperature

2019 ◽  
Vol 9 (8) ◽  
pp. 1670 ◽  
Author(s):  
Yong Du ◽  
Zhang-ming Gou
Keyword(s):  
Mechanical Properties ◽  
Elevated Temperature ◽  
Ambient Temperature ◽  
Strain Gauge ◽  
Complex Shape ◽  
Full Range ◽  
Steel Cable ◽  
Stress Strain ◽  
Strain Stress ◽  
Steel Cables

As the limit of traditional contact measurement, it is difficult to precisely measure the steel cables twisted by a branch of wires especially at elevated temperature. In this paper the strain-stress relationships of S355 and S690 structural steel, 1860 MPa steel cable twisted by seven wires have been measured by the strain gauge, extensometer and non-contact video gauge at ambient temperature and elevated temperature, respectively. Comparison of the stress-strain curves gotten by different measuring technology, it indicates that the non-contact video gauge can provide a more efficient and reliable database than the strain gauge as well as extensometer, especially at an elevated temperature. It is worth noting that the non-contact video gauge can capture not only the full range of stress-strain curves of steel cables, but is also efficient for the specimens with a complex shape.

scholarly journals Ambient temperature field measuring system for LHC superconducting dipoles

1996 ◽  
Vol 32 (4) ◽  
pp. 3073-3076 ◽  
Author(s):  
J. Billan ◽  
S. De Panfilis ◽  
D. Giloteaux ◽  
O. Pagano
Keyword(s):  
Temperature Field ◽  
Ambient Temperature ◽  
Measuring System ◽  
Field Measuring

scholarly journals Applying fiber-optic system to control shaft torque

2021 ◽  
Vol 2021 (3) ◽  
pp. 101-106
Author(s):  
Alexander Sergeevich Bordyug
Keyword(s):  
Strain Gauge ◽  
Electromagnetic Interference ◽  
Oil And Gas ◽  
Fiber Optic ◽  
Electrical Equipment ◽  
Torque Control ◽  
Measuring System ◽  
Degree Of Protection ◽  
Fabry Perot ◽  
Fiber Optic System

The article considers the procedure of torque control, which is very popular in a wide variety of industries with many design features. In marine power engineering the problems of determining the forces, torque on the shaft and power are solved by means of torsiometers with torque sensors. The most widely used torque sensors are of capacitive, induction, strain gauge and photoelectric types. It has been stated that there are limitations in the process of torque control due to the susceptibility of systems to the electromagnetic interference, lack of a high degree of protection for electrical equipment and necessary recalibration. Fiber optic systems have found application in torque measurement systems in the oil and gas and aerospace industries. The use of such systems on ships is more expensive in comparison with the technologies used today, for example, the systems based on strain gauges. It has been proposed to use an inexpensive optical measuring system based on the Pound-Drever-Hall technique with using a foil-clad strain gauge and an aluminum torsion rod. There has been illustrated the system of torque control, the phase graphs for the Fabry-Perot resonator and the graph of the resonator transmission spectrum are presented, the reflection coefficient value is given. A method for measuring the phase of a reflected beam from a Fabry-Perot resonator is being considered, the injection current of a laser is modulated by means of an electric oscillator to generate side stripes in the electric field of a laser beam. The carried out studies and calculations contribute to improving the reliability of the coastal power system; the possibility of their use in marine electrical systems has been proved.

scholarly journals Analysis and Modeling of the Wear-Out Process of a Lithium-Nickel-Manganese-Cobalt Cell during Cycling Operation under Constant Load Conditions

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3899 ◽  
Author(s):  
Damian Burzyński ◽  
Robert Pietracho ◽  
Leszek Kasprzyk ◽  
Andrzej Tomczewski
Keyword(s):  
Ambient Temperature ◽  
Experimental Research ◽  
Discharge Current ◽  
Fuzzy Model ◽  
Constant Load ◽  
Operating Parameters ◽  
Half Cycle ◽  
Wear Process ◽  
Nickel Manganese ◽  
Load Conditions

This article describes the analyses of modeling the wear process of lithium-nickel-manganese-cobalt cells operating cyclically under constant load conditions. The main aging processes taking place in cells and the methodology of the modeling are discussed. The process of cell wear is examined, taking into account the influence of cyclic operating parameters (temperature, discharge current, and discharge depth). On the basis of the analyses carried out, a new function reflecting the influence of ambient temperature on the durability of the cell is proposed. A new fuzzy model of the wear process of the NMC 18650 type cell, depending on the parameters of the discharge half cycle, has been developed. The results of the model have been verified by experimental research.

scholarly journals An electronic system for measuring and recording the dimensions of horticultural produce

1992 ◽  
Vol 72 (1) ◽  
pp. 317-321
Author(s):  
D. J. Buckley ◽  
W. E. Fagan ◽  
C. L. Ricketson
Keyword(s):  
Simultaneous Measurement ◽  
Data Entry ◽  
Electronic System ◽  
Measuring System ◽  
Rigid Support ◽  
Electronic Measuring ◽  
Portable Computer ◽  
Support Frame ◽  
Entry Time ◽  
System Components

The design and operation of an electronic measuring system for simultaneous measurement of vertical and horizontal dimensions of horticultural produce are described. The system consists of two electronic scale units, mounted on a rigid support frame, which are connected to a portable computer via a multiplexer. A hand-held electronic calliper is also connected to the multiplexer to add versatility to the system for measuring small or untrimmed produce. System components are readily available and relatively inexpensive. The system is accurate, reliable and reduces total measuring and data entry time to about 40% of that required using manual methods.Key words: Electronic measuring system, horticultural produce

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