Test Method for Measuring Road Roughness by Static Level Method

2017 ◽  
Author(s):  
Keyword(s):  
Test Method ◽  
Road Roughness ◽  
Level Method ◽  
Static Level

AN ADVANCED MEASUREMENT OF PADDY FIELD SURFACE ROUGHNESS BY STATIC LEVEL METHOD

2013 ◽  
Vol 83 (5) ◽  
Author(s):  
Đỗ Minh Cường ◽  
Zhu shi Hong ◽  
Nguyễn Thị Ngọc ◽  
Farman Ali Chandio
Keyword(s):  
Surface Roughness ◽  
Spatial Frequency ◽  
Paddy Field ◽  
Surface Profile ◽  
High Spatial Frequency ◽  
Roughness Coefficient ◽  
Power Spectral ◽  
Level Method ◽  
Static Level ◽  
Iso 8608

Determination of accurate paddy field surface profile has great importance to designing the paddy tractor suspension system. With this aim, a new test rig has been designed and developed to measure paddy field surface profiles using static level method (sampled interval of 200mm). The data were analyzed through Matlab/Simulink software to obtain power spectral densities (0.05-3.5c/m) of the measured profiles on a log-log scale and it was found that the amplitude variation of the power spectral density (PSD) at low spatial frequency was higher than at high spatial frequency whereas the undulation of the PSD curve was largely changed from low to high frequency with roughness coefficient of 645.06x10-6 m3/cycle and slope value of 1.2399  representing the paddy field surface roughness under class D of ISO 8608 standards. This classification has great significance in the field of tractor vibration simulation work. Keywords: Paddy field surface, Rod and Level, Static level method, ISO 8608.

scholarly journals Road-Feature-Based Multiparameter Road Complexity Calculation Model of Off-Road Environment

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Yanan Zhao ◽  
Zhiwei Li ◽  
Li Gao ◽  
Jian Xiong
Keyword(s):  
Three Dimensional ◽  
Calculation Model ◽  
Test Method ◽  
Ground Vehicles ◽  
Analytic Hierarchy ◽  
Ground Vehicle ◽  
Road Roughness ◽  
Feature Based ◽  
Vehicle Technologies ◽  
Road Data

To promote the development of unmanned ground vehicle technologies, it is necessary to design a scientific and reasonable test method. Road is an important part of test environmental elements, and different road conditions can examine the adaptability of unmanned ground vehicles to the environment. Therefore, the scientific calculation of road complexity is of great importance. Previous studies on road are mainly based on the concept of road roughness; however due to the unicity of road feature indicators, road complexity can only be reflected to a certain extent. This paper proposes a new road-feature-based multiparameter road complexity calculation model of off-road environment to show the complexity of road more comprehensively. First, a multi-sensor-based data acquisition mobile platform is established to obtain more complete road data. Then, based on the analysis of road feature, road indicators like three-dimensional scale, average slope, and adhesion characteristics of travelable area are obtained. According to the analysis methods of road roughness, the principle of analytic hierarchy process, and the data collected from off-road environment, the calculation model of road complexity is determined. Finally, by calculating complexities of several cross-country roads, the feasibility of this model is verified, which provides a theoretical support for the scientific calculation and quantitative analysis of different road complexities.

Metrological support of individual blood glucose meters in telemedicine

2019 ◽  
pp. 52-56
Author(s):  
Yu.F. Glukhov ◽  
N.V. Krutikov ◽  
A.V. Ivanov ◽  
N.P. Muravskaya
Keyword(s):  
Blood Glucose ◽  
Blood Glucose Level ◽  
Glucose Level ◽  
Measurement Data ◽  
Test Method ◽  
Level Measurement ◽  
Measurement Devices ◽  
Real Practice ◽  
Health Care Centers ◽  
Medical Measurement

We have studied and analyzed status and metrological supervision of blood glucose monitors, individual devices for a person’s blood glucose level measurement. It has been indicated that nowadays blood glucose monitors like other individual devices for medical measurement are not allowed to be involved in telemedicine public service. This accounts for absence of metrological supervision with these measurement devices in telemedicine. In addition, the key problem is absence of safe methods and means of remote verificaition, calibration and transmission of measurement data to health care centers. The article offers a remote test method for blood glucose monitors using a number of resistors with values correlating with measured blood glucose level. The available method has been successfully trialed in real practice.

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