scholarly journals Problems of the dynamic test method for individual protection equipment (shock absorbers)

2018 ◽  
Vol 193 ◽  
pp. 05034 ◽  
Author(s):  
Dmitry Korolchenko ◽  
Vasily Vasilenko ◽  
Georgy Lelikov
Keyword(s):  
Dynamic Performance ◽  
Dynamic Test ◽  
Test Methods ◽  
Test Method ◽  
Testing System ◽  
Protective Properties ◽  
Shock Absorbers ◽  
Individual Protection ◽  
European Standards ◽  
Protective Performance

This paper examines issues of safety of high-altitude works, using individual protection equipment to prevent falling from a height. In particular, the paper reviews personal protective equipment - shock absorber, its dynamic characteristics and related test methods to meet the requirements of Technical Regulations 019/2011 “Safety of Individual Protection Equipment”. The paper discusses the differences between the Russian and European standards for dynamic characteristic testing of shock absorbers, even as the former are harmonized texts of the latter, and the effect of such differences on protective performance of shock absorbers and ultimately on safety of works on heights. It have been shown that tests, conducted in accordance with the Russian regulative documents for dynamic performance of the shock absorbers, entail decreasing in safety usage of such type of IPE and increasing in injuries during falls from a height. It has been defined necessity to actualize the range of the testing system of shock absorbers, and to admit its larger value that will cause increase in protective properties of shock absorbers.

scholarly journals Concept and Realization of a Novel Test Method Using a Dynamic Test Stand for Detecting Persons by Sensor Systems on Autonomous Agricultural Robotics

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2315
Author(s):  
Christian Meltebrink ◽  
Tom Ströer ◽  
Benjamin Wegmann ◽  
Cornelia Weltzien ◽  
Arno Ruckelshausen
Keyword(s):  
Environmental Conditions ◽  
Dynamic Test ◽  
Test Methods ◽  
Test Stand ◽  
Human Detection ◽  
Test Method ◽  
Sensor Systems ◽  
Functional Safety ◽  
Agricultural Robots ◽  
Agricultural Robotics

As an essential part for the development of autonomous agricultural robotics, the functional safety of autonomous agricultural machines is largely based on the functionality and robustness of non-contact sensor systems for human protection. This article presents a new step in the development of autonomous agricultural machine with a concept and the realization of a novel test method using a dynamic test stand on an agricultural farm in outdoor areas. With this test method, commercially available sensor systems are tested in a long-term test around the clock for 365 days a year and 24 h a day on a dynamic test stand in continuous outdoor use. A test over a longer period of time is needed to test as much as possible all occurring environmental conditions. This test is determined by the naturally occurring environmental conditions. This fact corresponds to the reality of unpredictable/determinable environmental conditions in the field and makes the test method and test stand so unique. The focus of the developed test methods is on creating own real environment detection areas (REDAs) for each sensor system, which can be used to compare and evaluate the autonomous human detection of the sensor systems for the functional safety of autonomous agricultural robots with a humanoid test target. Sensor manufacturers from industry and the automotive sector provide their sensor systems to have their sensors tested in cooperation with the TÜV.

A New Dynamic Test Method of Fiber Optic Gyroscope

2012 ◽  
Vol 157-158 ◽  
pp. 245-249 ◽  
Author(s):  
Xu You Li ◽  
Na Zhang
Keyword(s):  
Input Signal ◽  
Fiber Optic ◽  
Dynamic Error ◽  
Dynamic Performance ◽  
Dynamic Test ◽  
Sine Wave ◽  
Test Method ◽  
Working Environment ◽  
Fiber Optic Gyroscope ◽  
Sway Motion

The sway motion of ships follows sine law. Therefore, it needs high dynamic performance of fiber optic gyroscope (FOG) to meet the serious working environment. A new test method was introduced to make reasonable assessment on the dynamic performance of FOG. The principle of this new test method was that the sine wave provided by the IP core in FPGA was superimposed on the digital ladder to simulate the input signal of sway motion. It could be proved that the serial of sine signal, which was generated by this method, was equivalent to the external input signal. Moreover, the dynamic error model of FOG was established to provide the theory of dynamic test. The results of dynamic test of FOG indicated that the dynamic error did not have divergent trends, the system parameters set was reasonable and the FOG system was stable. It also can be seen that dynamic error of FOG was increased with the increasing of sine wave amplitude, which was accord with the actual situation. The new dynamic test method of FOG was verified.

A Novel Testing System for Mechanics Properties of the Thin-Walled Micro Components in Inertial System

2016 ◽  
Vol 861 ◽  
pp. 229-235
Author(s):  
Lin Che ◽  
Bo Wang ◽  
Guo Li
Keyword(s):  
Dynamic Test ◽  
Test System ◽  
Test Method ◽  
Testing System ◽  
Performance Tests ◽  
Axial Loads ◽  
Testing Specimen ◽  
Testing Method ◽  
Mechanics Performance ◽  
Thin Walled

In this paper, micro tensile method was combined with micro bridge dynamic test method as a new testing method for mechanics performance to be put forward, and a novel testing system for mechanics properties of the thin-walled micro components was established. The micro testing specimen were designed and manufactured. And related mechanics performance tests were carried on to verify the feasibility and reliability of the test system. The experimental results show that displacements of the testing system are measured with 0.01μm resolution and axial loads are measured with 0.005N resolution.

Hot Pin Pull Method – New Test Procedure for the Adhesion Measurement for 3D-MID

2014 ◽  
Vol 1038 ◽  
pp. 115-120 ◽  
Author(s):  
Christian Goth ◽  
Thomas Kuhn ◽  
Gerald Gion ◽  
Jörg Franke
Keyword(s):  
Test Procedure ◽  
Test Methods ◽  
Test Method ◽  
Testing System ◽  
Adhesion Test ◽  
Metallic Structures ◽  
Adhesion Measurement ◽  
Molded Interconnect Devices ◽  
Unsolved Issue

The adhesion test of metallic structures on MID (Molded Interconnect Devices) parts is an unsolved issue. So far no method really works reliably. The test methods which are conventionally used are the pull-off test and the shear-test. Both show large standard deviation and the reproducibility is not assured. Nordson DAGE has introduced the new micro-material testing system 4000Plus. This device enables a new test method for the determination of the adhesion strength of MID structures using the hot pin pull (hot bump pull) method. Copper pins (tinned or untinned) are heated up with a user defined temperature profile, soldered to a metallized structure on the MID and then removed vertically upward, while the force is recorded. In this contribution investigations with this new test method are presented.

scholarly journals PERANCANGAN DAN PENERAPAN COMPUTER BASED TEST (CBT) PADA SMK MUHAMMADIYAH KRAGILAN

2019 ◽  
Vol 2 (1) ◽  
pp. 50-63
Author(s):  
Ely Nuryani ◽  
Wawan Suandi
Keyword(s):  
Teaching And Learning ◽  
Test Methods ◽  
Test Method ◽  
Testing System ◽  
National Examination ◽  
Efficiency And Effectiveness ◽  
Computer Based ◽  
Alternative Test ◽  
Partner Schools ◽  
Method Model

In education field, examinations have become one way to measure the level of student achievement at school. Examinations that are usually used in schools such as daily/weekly/monthly exams, midterm exams (UTS) and final semester examinations (UAS). By using the exam, both students and teachers can evaluate each other about their teaching and learning activities. The examination model used so far is a conventional method model using paper-based tests. Traditional methods still have many disadvantages so other methods are needed to create efficiency, effectiveness, security, accuracy, and fast testing system. Another model that has been applied in school student test activities is the Computer Based Test (CBT Method). This method is proven to improve efficiency and effectiveness in the exam. Unfortunately, this new approach is only applied to national examination activities and has not been evenly distributed throughout the school. To use it in all the exam processes such as daily/weekly/monthly exams, midterm exams (UTS) and final semester examinations (UAS), this research uses waterfall metod was conducted at the Muhammadiyah Kragilan. The goal to be achieved is the creation of alternative test methods that can be used by partner schools that are more efficient, more effective, safer, more accurate and faster than the old test method

Dynamic Assessment about Simple-Supported Girder Bridge

2011 ◽  
Vol 105-107 ◽  
pp. 1272-1275
Author(s):  
Wei Zhao Li ◽  
Zong Lin Wang ◽  
Da Wei Sun
Keyword(s):  
Dynamic Assessment ◽  
Dynamic Performance ◽  
Effective Means ◽  
Good Condition ◽  
Dynamic Test ◽  
Assessment Method ◽  
Test Methods ◽  
Ambient Vibration ◽  
Girder Bridge ◽  
Vibration Tests

The objective of this study is to introduce a dynamic assessment method about simple-supported girder bridge .This paper introduces the dynamic test contents, test methods, test results and the assessment index. The dynamic tests included ambient vibration tests which were used to identify the bridge modal parameters and forced vibration tests based on controlled traffic loads which were used to obtain the and vibratory response. The analytical results showed that the dynamic performance was in good condition and the bridge had great potential of carrying capacity. This method provided effective means for the assessment of the existing simple-supported girder bridge.

Test Research for Thermal Protective Properties of Mobile Refuge Chamber

2013 ◽  
Vol 561 ◽  
pp. 635-639
Author(s):  
De Gong Chang ◽  
Min Min Du ◽  
Xin Jun Gao
Keyword(s):  
Theoretical Analysis ◽  
Coal Mine ◽  
Heat Insulation ◽  
Test Methods ◽  
Test Method ◽  
Protective Properties ◽  
Temperature Changes ◽  
External Heating ◽  
Heating Test

In this paper we have a discussion on heat insulation method of the using of mobile refuge chamber for coal mine and the improved scheme was put forward to improve the performance of thermal protective properties of the refuge chamber. Then according to the theoretical analysis and the external heating test methods to be compared,we conduct an analysis.The test method are introduced, and the factors caused the temperature changes are analyzed based on the test.These results have directive significance for the further improvement of refuge chambers.

An evaluation of ECT sample height for small flute board grades and Box Manufacturer’s Certification compliance

TAPPI Journal ◽  
2009 ◽  
Vol 8 (6) ◽  
pp. 24-28
Author(s):  
CORY JAY WILSON ◽  
BENJAMIN FRANK
Keyword(s):  
Compressive Strength ◽  
Compressive Load ◽  
Test Sample ◽  
Test Methods ◽  
Test Method ◽  
Initial Development ◽  
Sample Height ◽  
Relationship Of ◽  
The Relationship ◽  
Corrugated Fiberboard

TAPPI test T811 is the specified method to ascertain ECT relative to box manufacturer’s certification compliance of corrugated fiberboard under Rule 41/ Alternate Item 222. T811 test sample heights were derived from typical board constructions at the time of the test method’s initial development. New, smaller flute sizes have since been developed, and the use of lighter weight boards has become more common. The T811 test method includes sample specifications for typical A-flute, B-flute, and C-flute singlewall (and doublewall and triplewall) structures, but not for newer thinner E-flute or F-flute structures. This research explores the relationship of ECT sample height to measured compressive load, in an effort to determine valid E-flute and F-flute ECT sample heights for use with the T811 method. Through this process, it identifies challenges present in our use of current ECT test methods as a measure of intrinsic compressive strength for smaller flute structures. The data does not support the use of TAPPI T 811 for ECT measurement for E and F flute structures, and demonstrates inconsistencies with current height specifi-cations for some lightweight B flute.

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