Study on detection of lumps in a soft object by using a scanning roller type palpation sensor system

2020 ◽  
Vol 64 (1-4) ◽  
pp. 745-752
Author(s):  
Taku Wakayama ◽  
Takeshi Okuyama ◽  
Mami Tanaka
Keyword(s):  
Reaction Force ◽  
Small Diameter ◽  
Load Cell ◽  
Sensor System ◽  
Type Contact ◽  
Soft Object ◽  
Contact Part ◽  
Deep Position

In this study, a palpation sensor system is developed to detect a lump in a soft object. The developed sensor system consists of a contact part using a bearing, two linear sliders and a 3-axis load cell. While the roller type contact part is scanned against a soft object, reaction force applied to the contact part is measured. Lumps are detected by measuring fluctuation of the reaction force. In experiments, the sensor system is scanned against the samples. From the results, it is found that the lump with a small diameter embedded at a deep position.

Rancang Bangun Smart Case Sistem Monitoring Tabung Gas Elpiji Berbasis Mikrokontroler

CHIPSET ◽  
2020 ◽  
Vol 1 (02) ◽  
pp. 61-68
Author(s):  
Anisha Fadia Haya ◽  
Werman kasoep ◽  
Nefy Puteri Novani
Keyword(s):  
Error Rate ◽  
Load Cell ◽  
Sensor System ◽  
System Testing ◽  
A Value ◽  
Gas Leak ◽  
Weight Value ◽  
Gas Cylinders ◽  
Sms Notification ◽  
Module System

This study aims to create a system that can monitor gas cylinders where this device consists of two systems, the first is a system to measure the weight of 3kg LPG gas cylinders to find the remaining gas which will then be displayed on the LCD, and the second the system gives a notification (alarm) if there is a gas leak via SMS. This system consists of Arduino UNO Microcontroller components, Load cell Sensor, MQ-6 Sensor, and SIM800L GSM Module. For overall system testing, the load cell sensor system can display a percentage of the weight value obtained an error rate of 0%, this indicates that the formula used in the program runs according to what is desired. In the MQ-6 sensor system can make the buzzer on at a value >= 700 ppm, the results of the buzzer can live when the detected gas value >= 700 ppm, this is as desired. In the sim800L gsm module system can send leak notifications, the results obtained that the module can send SMS notifications. And the system turns on the buzzer when the LPG gas has reached the minimum limit, the results obtained by the buzzer will sound when the remaining gas value <= 16%. Based on tests conducted on this system the system can measure the desired weight of the cylinder to look for the remaining gas in the form of a percentage and detect a gas leak and then send an SMS notification.

scholarly journals Theoretical and numerical investigation into brush seal hysteresis without pressure differential

2019 ◽  
Vol 28 ◽  
pp. 096369351988538
Author(s):  
Yuchi Kang ◽  
Meihong Liu ◽  
Xiangping Hu ◽  
Sharon Kao-Walter ◽  
Baodi Zhang
Keyword(s):  
Numerical Model ◽  
Reaction Force ◽  
Pressure Differential ◽  
Influential Factor ◽  
Contact Method ◽  
Analytic Model ◽  
The Finite Element Method ◽  
Brush Seal ◽  
Type Contact ◽  
Contact Seal

Brush seal is a novel type contact seal, and it is well-known due to its excellent performance. However, there are many intrinsic drawbacks, such as hysteresis, which need to be solved. This article focused on modeling hysteresis in both numerical way and analytic way without pressure differential. The numerical simulation was solved by the finite element method. General contact method was used to model the inter-bristle contact, bristle–rotor contact, and bristle–backplate contact. Bristle deformation caused by both vertical and axial tip force was used to validate the numerical model together with reaction force. An analytic model in respect of the strain energy was created. The influence of structure parameters on the hysteresis ratio, with the emphasis on the derivation of hysteresis ratio formula for brush seals, was also presented. Both numerical model and analytic model presented that cant angle is the most influential factor. The aim of the article is to provide a useful theoretical and numerical method to analyze and predict the hysteresis. This work contributes the basis for future hysteresis investigation with pressure differential.

Aggressive Approach to Salvage Non-Maturing Arteriovenous Fistulae: A Retrospective Study with follow-up

2009 ◽  
Vol 10 (3) ◽  
pp. 183-191 ◽  
Author(s):  
Gregg A. Miller ◽  
Naveen Goel ◽  
Aleksandr Khariton ◽  
Alexander Friedman ◽  
Yevgeny Savransky ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Small Diameter ◽  
Size Class ◽  
Arteriovenous Fistulae ◽  
Aggressive Approach ◽  
Vessel Size ◽  
Class 1 ◽  
Fistula Maturation ◽  
Deep Position

Purpose To establish a standardized approach for the maturation of non-maturing arteriovenous fistulae. Methods consecutive patients (n=122) with non-maturing fistulae presented to our outpatient vascular access center for percutaneous interventions to assist in maturation. The techniques used included flow rerouting, competing branch vein elimination, staged balloon angioplasty, and limited controlled extravasation. Results Successful fistula maturations were achieved in 118/122 patients. Fistulae were divided into two classes according to initial vessel size: class 1 (6.0–8.0 mm diameter, >6 mm deep) and class 2 (2.0–5.0 mm diameter) fistulae were evaluated for differences in technical procedures and clinically successful fistula maturation. Class 1 and class 2 fistulae were evaluated for mean number of procedures to maturation (1.6 and 2.6, respectively), and time to maturation (5 and 7 weeks, respectively). Follow-up for 109 of the initial 118 patients was achieved (mean=24 months, range=0.25–60 months). Class 1 and class 2 fistulae had primary patencies of 17 and 39% at 6 months; and secondary patencies of 72 and 77% at 12 months, 53 and 61% at 24 months, and 42 and 32% at 36 months, respectively. Primary and secondary patencies (Mann-Whitney test, p=0.44 and p=0.38, respectively) of class 1 and class 2 fistulae did not differ significantly, and secondary patencies were comparable to other fistula salvage studies. Conclusion Fistula salvage attempts should not be limited by factors such as a diffusely small diameter or an inaccessibly deep position.

J102021 A study on wearable ground reaction force and motion sensor system

2011 ◽  
Vol 2011 (0) ◽  
pp. _J102021-1-_J102021-6
Author(s):  
Yoshio INOUE ◽  
Tao LIU ◽  
Kyoko SHIBATA ◽  
Kozo SHIOJIMA ◽  
Nobutaka TSUJIUCHI
Keyword(s):  
Ground Reaction Force ◽  
Reaction Force ◽  
Sensor System ◽  
Motion Sensor ◽  
Force And Motion

scholarly journals Numerical Modelling of Seabed Impact Effects on Chain and Small Diameter Mooring Cables

2018 ◽  
Author(s):  
Chee Meng Low
Keyword(s):  
Numerical Modelling ◽  
Reaction Force ◽  
Small Diameter ◽  
Mooring Line ◽  
Force Model ◽  
Dynamic Tension ◽  
Commercial Software ◽  
Mooring Lines ◽  
Root Cause ◽  
Code Validation

Catenary mooring lines experience liftoff from and grounding on the seabed when undergoing large dynamic motions. Numerical line mooring models account for this interaction using various seabed models and it is known that the action of liftoff and grounding may lead to large dynamic tension fluctuations. These fluctuations may be spurious due to the inability of discretised mooring models to adequately account for the effect of the seabed on the mooring line. In this work, the root cause and conditions that lead to the production of the large dynamic tension fluctuations is determined. The effect of line discretisation and seabed model on the tensionfluctuations is investigated using the widely used spring-mattress approach and a modified seabed reaction force model. An in-house mooring code was developed to perform these investigations. For code validation and benchmarking, and to illustrate the existence of the tension fluctuations problem due to nodal grounding inexisting mooring line simulation codes, comparisons are made to a commercial software.

A Soft Ground Reaction Force Sensor System Utilizing Time-Delay Recurrent Neural Network

2020 ◽  
Vol 20 (18) ◽  
pp. 10851-10861 ◽  
Author(s):  
Hyo Seung Han ◽  
Juyoung Yoon ◽  
Seungkyu Nam ◽  
Sangin Park ◽  
Dong Jin Hyun
Keyword(s):  
Neural Network ◽  
Time Delay ◽  
Recurrent Neural Network ◽  
Ground Reaction Force ◽  
Reaction Force ◽  
Force Sensor ◽  
Sensor System ◽  
Soft Ground

11102 Development of a New Wearable Ground Reaction Force Sensor System:Experimental Study of the Sensor System

2013 ◽  
Vol 2013.19 (0) ◽  
pp. 127-128
Author(s):  
Kazuhiro SUGAWARA ◽  
Nozomu KOIKE ◽  
Naoya KOSAKI ◽  
Jyun KOBAYASHI ◽  
Yoshihiro KAI
Keyword(s):  
Ground Reaction Force ◽  
Reaction Force ◽  
Force Sensor ◽  
Sensor System

scholarly journals DESIGN OF FORCE MEASURING SYSTEM ON MAIN LANDING GEAR WEIGHT DROP TESTING MACHINE FOR THE APPLICATION OF LSU SERIES

2020 ◽  
Vol 18 (2) ◽  
pp. 159
Author(s):  
Yusuf Giri Wijaya ◽  
Abian Nurrohmad
Keyword(s):  
Data Acquisition ◽  
Reaction Force ◽  
Testing Machine ◽  
Data Acquisition System ◽  
Landing Gear ◽  
Load Cell ◽  
Acquisition System ◽  
Measuring System ◽  
Weight Drop ◽  
The Impact

In this research, the design of the force measuring system on main landing gear weight drop test for the LSU series that developed by LAPAN was carried out. The principle of this machine is to apply the load according to the weight of the aircraft on the main landing gear and drop it at a certain height assisted by the guiding rail. At the bottom of this machine there is a impact platform where each angle is mounted with a load cell that functions to measure the reaction force due to the impact of the main landing gear. In addition, there is a data acquisition system whose function is to process the output signal from load cell and display measurement data. The data acquisition system used consists of DAQ measurement hardware made by national instruments and LabVIEW software installed on a PC. The design of this testing tools aims to carry out a dynamic impact test on the main landing gear structure of the UAV. In this study, static calibration has also been successfully performed on the impact platform and shows consistent results for various test masses.

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