scholarly journals Wavelet-Based Optimum Identification of Vehicle Axles Using Bridge Measurements

2020 ◽  
Vol 10 (21) ◽  
pp. 7485
Author(s):  
Hua Zhao ◽  
Chengjun Tan ◽  
Eugene J. OBrien ◽  
Nasim Uddin ◽  
Bin Zhang
Keyword(s):  
Field Trials ◽  
Correlation Factor ◽  
Vehicle Speed ◽  
The Road ◽  
Bridge Health Monitoring ◽  
Axle Detection ◽  
Weigh In Motion ◽  
Bridge Weigh In Motion ◽  
Health Monitoring Systems ◽  
On The Road

Accurate vehicle configurations (vehicle speed, number of axles, and axle spacing) are commonly required in bridge health monitoring systems and are prerequisites in bridge weigh-in-motion (BWIM) systems. Using the ‘nothing on the road’ principle, this data is found using axle detecting sensors, usually strain gauges, placed at particular locations on the underside of the bridge. To improve axle detection in the measured signals, this paper proposes a wavelet transform and Shannon entropy with a correlation factor. The proposed approach is first verified by numerical simulation and is then tested in two field trials. The fidelity of the proposed approach is investigated including noise in the measurement, multiple presence, different vehicle velocities, different types of vehicle and in real traffic flow.

scholarly journals Improved axle detection for bridge weigh-in-motion systems using fiber optic sensors

2017 ◽  
Vol 7 (3) ◽  
pp. 325-332 ◽  
Author(s):  
Myra Lydon ◽  
D. Robinson ◽  
S. E. Taylor ◽  
G. Amato ◽  
E. J. O. Brien ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Axle Detection ◽  
Weigh In Motion ◽  
Bridge Weigh In Motion

Analysis of Dynamic Load Level of High-Speed Heavy Vehicle Imposed on Uneven Pavement

2011 ◽  
Vol 138-139 ◽  
pp. 146-152
Author(s):  
Guo He Guo ◽  
Yu Feng Bai ◽  
Tao Wang
Keyword(s):  
Dynamic Load ◽  
High Speed ◽  
Load Level ◽  
Heavy Vehicle ◽  
Vehicle Speed ◽  
Destructive Effect ◽  
The Road ◽  
Wide Range ◽  
On The Road ◽  
Factor Interaction

Based on the significant destructive effect of heavy vehicle on uneven roads, two simplified models of pavement unevenness and vehicle dynamic load were established in accordance with D'A lembert principle, and Matlab software was used to analyze the changing law of dynamic load under the conditions of different road unevenness, vehicle speed and load. The results show that vehicles running on uneven road may produce more cumulative damages than static load, and DLC (dynamic load coefficient) changes in wide range, maximum up to 2.0 or more; the effect of speed and load on dynamic load is complex, and due to multi-factor interaction, DLC doesn’t consistently increase or decrease with speed and load increasing. Although the dynamic load level caused by high-speed heavy vehicle is not necessarily too high, its impact on the road can not be ignored.

Effects of Speed Bumps and Humps on Motorcycle Speed Profiles

2014 ◽  
Vol 931-932 ◽  
pp. 536-540 ◽  
Author(s):  
Wichuda Satiennam ◽  
Thaned Satiennam ◽  
Pornsiri Urapa ◽  
Tussawan Phacharoen
Keyword(s):  
Developing Countries ◽  
Developed Countries ◽  
Vehicle Speed ◽  
Passenger Car ◽  
The Road ◽  
Acceleration Rate ◽  
Major Mode ◽  
Before And After ◽  
On The Road ◽  
Speed Humps

In developed countries, the use of speed humps and bumps have evolved from extensive research and testing which been properly designed and standardized. On the contrary in developing countries, no systematic and scientific studies have been carried out on that environment, especially the study on the effects that the motorcyclists response to the humps and bumps. This study therefore reveals the riders behavior when negotiating their speed to the devices. A case study was conducted in the provincial cities of Thailand where the motorcycle was a major mode of transportation. Six locations with speed humps and bumps were selected. Vehicles passing times were simultaneously recorded at 12 points along each traffic calmed link. From these data, a speed profile for each individual vehicle and for a link could be derived. It is found that speed humps and bumps have critically different impacts on motorcycle rider and passenger car driver. The smaller size speed bumps could effectively control the rider speed but have diverse impacts on the driver. These speed differences could post more safety deficiency to the site. The effect of the device on riders behavior, however, is restricted to a short spatial range (about 20-30 m before and after the device). For the speed humps, the motorcycle speeds are quite varied depending mainly on the road terrain. It is found that the motorcyclists have significant lower acceleration rate on the upgrade terrain when compared to the passenger car. Therefore, it is important to take all these rider characteristics into considerations when design the road humps to control vehicle speed in the developing countries.

Study on the Dynamic Wheel Load of Multi-Axle Vehicle Based on Distribute Loading Weight

2010 ◽  
Vol 159 ◽  
pp. 35-40
Author(s):  
Zhong Hong Dong
Keyword(s):  
Dynamic Load ◽  
Influence Factors ◽  
Vehicle Speed ◽  
Tire Pressure ◽  
Wheel Load ◽  
The Road ◽  
Road Roughness ◽  
Tire Stiffness ◽  
On The Road

To study the dynamic wheel load on the road, a dynamic multi-axle vehicle mode has been developed, which is based on distribute loading weight and treats tire stiffness as the function of tire pressure and wheel load. Taking a tractor-semitrailer as representative, the influence factors and the influence law of the dynamic load were studied. It is found that the load coefficient increases with the increase of road roughness, vehicle speed and tire pressure, yet it decreases with the increase of axle load. Combining the influences of road roughness, vehicle speed, axle load and tire pressure, the dynamic load coefficient is 1.14 for the level A road, 1.19 for the level B road, 1.27 for the level C road, and 1.36 for the level D road.

scholarly journals DETERMINATION OF MOST SIGNIFICANT FACTORS FOR ANALYSIS OF HIGHWAY OPERATING CONDITIONS

2017 ◽  
Vol 16 (6) ◽  
pp. 493-497
Author(s):  
M. G. Solodkaya
Keyword(s):  
Real Life ◽  
Operating Conditions ◽  
Dynamic Loads ◽  
Vehicle Speed ◽  
Vehicle Dynamic ◽  
The Road ◽  
Road Pavement ◽  
On The Road ◽  
Significant Factors ◽  
Road System

Traffic circulation on highways is a random process. Therefore automotive damage rate and, respectively, roads on which they are moving is subjected to regularities of random processes. Dynamic processes of vehicle-road interaction are determined to various extents by a host of factors that include road pavement evenness and characteristics of moving vehicles. For this reason the following task has been set: to reveal the most significant factors and mathematically correlate values of vehicle dynamic loads with a quality of road pavement and vehicle speed. Such task statement has not been solved adequately and this situation determines importance and novelty of the investigations in the given direction. While solving the mentioned task the investigations which have been carried out under real-life conditions and with the help of real-life objects are considered as the most reliable ones. However, preparation and execution of such experiments as needed significantly complicates their implementation. In this regard it looks rather expediential to combine a factorial experiment with the tests of a checked model while using ECM with stage-by-stage parameter fixation of working processes passing in “vehicle-road” system, comprehensive assessment pertaining to influence of the selected factors and selection of their optimum combination. Mathematical dependence has been obtained to evaluate influence of several external factors on optimization of vehicle dynamic load on the road. This component makes it possible to attain a simplified and adequate description of element interaction in “vehicle – road” system. While investigating influence of pavement irregularities on maximum dynamic loads on the road influence rate of the selected factors is determined in the following sequence: vehicle weight, pavement evenness and speed of transport facility.

scholarly journals Rancang Bangun Sistim Mekanik Speedbump untuk Menghasilkan Dayalistrik sebagai Tenaga Pembuka Gerbang Pintu Tol Kota Medan

2018 ◽  
Vol 1 (1) ◽  
pp. 123-128
Author(s):  
Tarmizi Taher ◽  
Alexander Sebayang ◽  
Bustami Syam
Keyword(s):  
Dual Function ◽  
Vehicle Speed ◽  
Test Results ◽  
Generation System ◽  
The Road ◽  
2Nd Generation ◽  
Electric Station ◽  
Power Generation System ◽  
On The Road ◽  
A Current

Speed bump adalah mekanisme yang dipasang pada jalan untuk mengurangi laju kendaraan dengan tujuan keamanan. Pada penelitian ini dikembangkan sebuah speed bump yang memiliki fungsi ganda, yaitu mengurangi laju kendaraan dan sebagai pembangkit daya. Sistem pembangkit daya terdiri dari pasangan roda gigi, poros, roda gila, pegas, rantai dan kumparan generator. Prototipe kemudian diuji pada tingkat kecepatan yang bervariasi. Besar voltase dan arus yang dibangkitkan diukur. Hasil pengujian menunjukkan untuk massa pengendara 400 kg dan variasi kecepatan kendaraan 5 km/jam, 10 km/jam, dan 15 km/jam, dihasilkan tegangan 18 Voltase dan menghasilkan arus sebesar 0.27 ampere. Hasil yang dicapai ini masih kecil, sehingga mendorong peneliti memperbaiki desain stasiun listrik speed bump generasi ke-2. Speed bump is a mechanism that is installed on the road to reduce the speed of the vehicle with safety objectives. In this study a speed bump that has a dual function was developed, namely reducing the speed of the vehicle and as a power plant. The power generation system consists of pairs of gears, shafts, flywheels, springs, chains and generator coils. The prototype is then tested at varying speed levels. The voltage and current generated are measured. The test results show for the mass of the driver 400 kg and variations in vehicle speed 5 km / h, 10 km / h, and 15 km / h, voltage 18 voltage is generated and produces a current of 0.27 amperes. The results achieved are still small, prompting researchers to improve the design of the 2nd generation speed bump electric station.

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