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Design of a Capacitive Flexible Weighing Sensor for Vehicle WIM System

View Article: PubMed Central

ABSTRACT

With the development of the Highway Transportation and Business Trade, vehicle weigh-in-motion (WIM) technology has become a key technology and trend of measuring traffic loads. In this paper, a novel capacitive flexible weighing sensor which is light weight, smaller volume and easy to carry was applied in the vehicle WIM system. The dynamic behavior of the sensor is modeled using the Maxwell-Kelvin model because the materials of the sensor are rubbers which belong to viscoelasticity. A signal processing method based on the model is presented to overcome effects of rubber mechanical properties on the dynamic weight signal. The results showed that the measurement error is less than ±10%. All the theoretic analysis and numerical results demonstrated that appliance of this system to weigh in motion is feasible and convenient for traffic inspection.

No MeSH data available.


Spring and dashpot model.
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f4-sensors-07-01530: Spring and dashpot model.

Mentions: The simplest mechanical model of elastic body is a pure Hookean spring (Fig. 4(a)). This body is purely elastic and all inertial effects are neglected. Thus if the Hookean spring is subjected to an instantaneous stress σ, it will respond instantaneously with a strain ε, σ and ε being related by the equation(2)σ=Eεwhere E is elastic modulus.


Design of a Capacitive Flexible Weighing Sensor for Vehicle WIM System
Spring and dashpot model.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3814867&req=5

f4-sensors-07-01530: Spring and dashpot model.
Mentions: The simplest mechanical model of elastic body is a pure Hookean spring (Fig. 4(a)). This body is purely elastic and all inertial effects are neglected. Thus if the Hookean spring is subjected to an instantaneous stress σ, it will respond instantaneously with a strain ε, σ and ε being related by the equation(2)σ=Eεwhere E is elastic modulus.

View Article: PubMed Central

ABSTRACT

With the development of the Highway Transportation and Business Trade, vehicle weigh-in-motion (WIM) technology has become a key technology and trend of measuring traffic loads. In this paper, a novel capacitive flexible weighing sensor which is light weight, smaller volume and easy to carry was applied in the vehicle WIM system. The dynamic behavior of the sensor is modeled using the Maxwell-Kelvin model because the materials of the sensor are rubbers which belong to viscoelasticity. A signal processing method based on the model is presented to overcome effects of rubber mechanical properties on the dynamic weight signal. The results showed that the measurement error is less than ±10%. All the theoretic analysis and numerical results demonstrated that appliance of this system to weigh in motion is feasible and convenient for traffic inspection.

No MeSH data available.