Highway Overload Detection System

 

 

System Introduction

Economic growth demands an adequate transport infrastructure. Highway networks ensure healthy development of freight transport market. However, in this highly competitive and cost-conscious market, more and more owners or operators tend to overload their trucks to minimize transportation costs, posing a serious risk to the safety of drivers, passengers and other road users. Overloading is also a big headache for traffic police. Traffic police can only spot-check vehicles on the road based on their own experience, which is surely not adequate in averting overloading. As computer technology grows, a more effective and intelligent overload detection system has come into use. The system automatically calculates, prints out and saves the extra weight records, providing evidence to facilitate legal proceedings.

 

System Principle

An overload detection system is installed at each entrance of the highway. It uses pressure sensors and strain gauges installed on the road surface as detection points. Signal processing devices include signal amplifier, averager, analog-digital converter and computer system that are connected in sequence. The detection points are connected to corresponding amplifiers. The signals generated from the strain gauge that receives pressure from tyres are amplified by the amplifier and then sent to the averager, which works out the weighted averages of multi-analog signals.

 

These results are analog/digital converted and sent to the detection system computer, which compares them with the preset overload signal values covering and incorporating overload cases of diversified vehicles. If the current signal value exceeds the preset overload signal value, it will be recorded and stored by the computer, accompanied by the activation of the alarm system and video camera system, so that vehicle images and the license plate information are snatched by the computer system. Such information can also be transmitted to the traffic police command center as evidences for legal proceedings. In this system, EVOC MEC-5005 is primarily used for signal matching operation and photo snatching.

 

Block Diagram
The overload detection system consists of pressure sensor, video acquisition system and embedded computer system, etc.

 

 

 Features of MEC-5005

  • Onboard low power Intel® Atom™ D510 1.66G/D410, 2GB DDR2 memory 
  • Compact and rugged, fanless design, with heat-dissipating enclosure. 
  • Supports 6 x serial ports, 6 x USB ports, 2 x gigabit RJ45 network ports and VGA+LVDS dual display 
  • 1 x PCI and 2 x Mini PCI-E device can be expanded 
  •  Supports 9V-30V DC input power supply 
  • Overall dimensions: 255mm (W) x 241.9mm (D) x 103.8mm (H)

 

System Configuration

  • CPU: Intel® Atom™ D510 1.66G/D410
  • Memory: 2GB DDR2
  • Operating system: Win2000, Win XP or other embedded systems

 

System Evaluation

The requirements of the entire overload detection system on industrial PCs are adequately met by MEC-5005, which provides multiple communication serial ports, dual display interfaces, two PCI expansion slot and two Mini PCI-E expansion slot. The system structure of this box PC is compact, rugged and fanless, with heat-dissipating enclosure. MEC-5005 is ideally suited to some extremely harsh environments, such as heavy pollution, excessive dirt and electromagnetic interference.

 

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