scholarly journals Design and Realization of a Miniature Capacitive Silicon Force Sensor for Loads up to 500 KG

2000 ◽  
Author(s):  
R. A. F. Zwijze ◽  
R. J. Wiegerink ◽  
G. J. M. Krijnen ◽  
T. Hien ◽  
M. C. Elwenspoek
Keyword(s):  
Force Sensor ◽  
Full Scale ◽  
Load Cell ◽  
Measurement Results ◽  
Previous Design ◽  
Cell Force

Abstract In this paper, a micromachined silicon load cell (force sensor) is presented for measuring loads up to 500 kg. The load cell has been realized and tested. Measurement results show a hysteresis error of ±0.02% of the full-scale output (fso). Creep at 500 kg after 30 minutes is within 0.01% of the fso. These measurements show that the performance has improved by a factor of 10 compared to the previous design.

Wave Run-Up on the Zeebrugge Rubble Mound Breakwater: Full-Scale Measurement Results Versus Laboratory Results

2007 ◽  
Vol 233 ◽  
pp. 584-591 ◽  
Author(s):  
Julien De Rouck ◽  
Björn Van de Walle ◽  
Peter Troch ◽  
Jentsje van der Meer ◽  
Luc Van Damme ◽  
...  
Keyword(s):  
Full Scale ◽  
Measurement Results ◽  
Laboratory Results ◽  
Rubble Mound ◽  
Run Up

Launching of Ships and Floating Structures from Horizontal Berth by Tipping Table

1998 ◽  
Vol 14 (04) ◽  
pp. 265-276
Author(s):  
Ivo Senjanovic
Keyword(s):  
Structural Dynamics ◽  
Review Paper ◽  
Offshore Structures ◽  
Model Tests ◽  
Full Scale ◽  
Strength Analysis ◽  
Test Results ◽  
Floating Structures ◽  
Measurement Results

This review paper covers extensive investigations which were undertaken in order to verify the idea of launching of ships and other floating structures from a horizontal berth by a set of turning pads. This includes structural dynamics during launching, model tests and strength analysis of the structure and the launching system. The most important results, which were used for the design of the launching system, are presented. The preparation of a barge for side launching is described, and the full-scale measurement results are compared with the test results. The advantages of building ships and offshore structures on a horizontal berth are pointed out in the conclusion.

Kontaktkräfte beim ungeführten Vibrationsgleitschleifen*/Contact forces in unguided vibratory finishing

2015 ◽  
Vol 105 (06) ◽  
pp. 377-383
Author(s):  
F. Klocke ◽  
R. Brocker ◽  
F. Vits ◽  
P. Mattfeld
Keyword(s):  
Measurement System ◽  
Electrical Power ◽  
Force Sensor ◽  
Contact Forces ◽  
Work Piece ◽  
Data Logging ◽  
Vibratory Finishing ◽  
Revolution Speed ◽  
Measurement Results ◽  
Finishing Processes

Beim Vibrationsgleitschleifen wird der Werkstoffabtrag maßgeblich durch die vorherrschenden Kontaktkräfte zwischen dem Werkstück und den Schleifkörpern bestimmt. Dieser Fachartikel stellt ein Messsystem vor, mit dem die messtechnische Erfassung der Kontaktkräfte beim ungeführten Vibrationsgleitschleifen möglich ist. Ein Alleinstellungsmerkmal ist dabei die vollständig kabellose Ausführung des Messsystems. Somit wurden die Messergebnisse nicht durch Kabel beeinflusst, die üblicherweise für die Energieversorgung und Datenübertragung notwendig sind. Mithilfe dieses Messsystems wurde der Einfluss folgender Prozesseingangsgrößen systematisch untersucht: Schleifkörpergröße, Unwuchtmotordrehzahl, Versatzwinkel der Unwuchtgewichte sowie die Masse des unteren und oberen Unwuchtgewichts auf die Kontaktkräfte.   In vibratory finishing the material removal is influenced by the contact forces between work piece and media. In this paper a measurement system is presented which is able to measure contact forces between work piece and media in unguided vibratory finishing. The unique feature of the measurement system is its completely wireless construction so that the measurement results are not influenced by wires of the force sensor system including the electrical power supply and the data logging. By means of this measurement system, contact forces can be measured in unguided vibratory finishing processes for the first time. Furthermore, the influence of media size and adjustment of the unbalance motor like revolution speed, phase angle and mass distribution between the upper and the lower eccentric weight on the contact forces was investigated.

scholarly journals A Novel Cell Force Sensor for Quantification of Traction during Cell Spreading and Contact Guidance

2007 ◽  
Vol 93 (1) ◽  
pp. 335-345 ◽  
Author(s):  
N. Tymchenko ◽  
J. Wallentin ◽  
S. Petronis ◽  
L.M. Bjursten ◽  
B. Kasemo ◽  
...  
Keyword(s):  
Cell Spreading ◽  
Force Sensor ◽  
Contact Guidance ◽  
Cell Force

scholarly journals In-Situ Wireless Pressure Measurement Using Zero-Power Packaged Microwave Sensors

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1263 ◽  
Author(s):  
Julien Philippe ◽  
Maria De Paolis ◽  
Dominique Henry ◽  
Alexandre Rumeau ◽  
Antony Coustou ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Pressure Sensors ◽  
Measurement Range ◽  
Full Scale ◽  
Remote Measurement ◽  
Reverberant Environments ◽  
Indoor Wireless ◽  
Measurement Results ◽  
Radar Imagery ◽  
First Time

This paper reports the indoor wireless measurement of pressure from zero-power (or passive) microwave (24 GHz) sensors. The sensors are packaged and allow the remote measurement of overpressure up to 2.1 bars. Their design, fabrication process and packaging are detailed. From the measurement of sensor scattering parameters, the outstanding sensitivity of 995 MHz/bar between 0.8 and 2.1 bars was achieved with the full-scale measurement range of 1.33 GHz. Moreover, the 3D radar imagery technique was applied for the remote interrogation of these sensors in electromagnetic reverberant environments. The full-scale dynamic range of 4.9 dB and the sensitivity of 4.9 dB/bar between 0.7 and 1.7 bars were achieved with radar detection in a highly reflective environment. These measurement results demonstrate for the first time the ability of the radar imagery technique to interrogate fully passive pressure sensors in electromagnetic reverberant environments.

Full Scale Measurements and Flow Analysis on a High Speed Rescue/Patrol Boat

2015 ◽  
Author(s):  
Hans Jørgen Mørch ◽  
Thomas Larsen ◽  
Erik Mostert ◽  
Karl Marius Norschau ◽  
Gunnar Semb
Keyword(s):  
High Speed ◽  
Cfd Simulation ◽  
Flow Analysis ◽  
Full Scale ◽  
Limiting Factor ◽  
Safe Operation ◽  
Cfd Simulations ◽  
Measurement Results ◽  
Calm Water ◽  
Operational Envelope

Through use of state of the art tools for flow analysis the aims to establish a methodology to determine the performance of a high speed planing craft both in calm water and in waves. Verification against full scale measurements is conducted. The ability to maintain speed in waves is of great interest -both with respect to added resistance and with respect to safe operation and loads on the crew from accelerations. Full scale measurements and CFD (Computational Fluid Dynamics) were conducted on a Norsafe Magnum 850fast patrol boat. The measurements have been conducted during a boat challenge along the Iberian coast. The challenge was run in advance of the HSBO (High Speed Boat Forum) which was held in Lisbon, Portugal, May2015.CFD simulations at similar conditions to the measurements are used for validation. It is further shown how CFD can be used to expand operational envelopes beyond the point where full scale measurements are applicable. This is especially relevant for the acceleration loads on the crew which is often the limiting factor of small HSC (High Speed Crafts). Pressure loads are extracted from the CFD and are evaluated against the current standards for life boats. Various criteria are discussed and the most relevant are analyzed for the measurement results and the CFD simulation. An operational envelope where the different criteria are combined is suggested.

scholarly journals Monitoring Method of Total Seed Mass in a Vibrating Tray Using Artificial Neural Network

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3659 ◽  
Author(s):  
Zhan Zhao ◽  
Fang Qin ◽  
Chun-Jie Tian ◽  
Simon Yang
Keyword(s):  
Neural Network ◽  
Relative Error ◽  
Back Propagation ◽  
Seed Mass ◽  
Force Sensor ◽  
Monitoring Method ◽  
Four Corners ◽  
Measurement Results ◽  
Total Seed ◽  
The Impact

To maintain the continuous working performance of a vacuum plate seeder, it is important to monitor the total seed mass in the seed tray in real time and accurately control the pickup position of the suction plate accordingly. Under the excitation of reciprocating vibration varying with time and interference by direction angle, the motion of seeds in a rectangular tray was simulated using the discrete element method (DEM). A measurement method for seed mass in a small area was proposed based on the impulse theorem. The impact force of seeds was monitored with a cantilever force sensor, and the corresponding signal processing circuit was designed. Calibration results indicated that the relative nonlinear error was less than 2.3% with an average seeds-mass-per-unit-area (SMA) of 0.3–2.4 g/cm2. Then, four sets of force sensors were installed symmetrically near the four corners of the vibrating tray which were used to measure the SMA respectively. Back propagation (BP) neural networks which take four SMA measurement results as input parameters were developed to monitor the total seed mass in the tray. Monitoring results using DEM simulation data showed that the general relative error was 3.0%. Experiments were carried out on a test-rig and the results validated that the relative error was reduced to 5.0% by using the BP neural network method.

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