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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.


Related in: MedlinePlus

Strain curve for Maxwell-Kelvin model.
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f6-sensors-07-01530: Strain curve for Maxwell-Kelvin model.

Mentions: From the equation above, it is clear that ε0 is equal to σ/E1 when t is zero. Namely, there is only elastic strain. With time increasing, creep happens continuously and the time rate slows down, at last the curve tends to an asymptote, as shown in Fig.6.


Design of a Capacitive Flexible Weighing Sensor for Vehicle WIM System
Strain curve for Maxwell-Kelvin model.
© Copyright Policy
Related In: Results  -  Collection

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

f6-sensors-07-01530: Strain curve for Maxwell-Kelvin model.
Mentions: From the equation above, it is clear that ε0 is equal to σ/E1 when t is zero. Namely, there is only elastic strain. With time increasing, creep happens continuously and the time rate slows down, at last the curve tends to an asymptote, as shown in Fig.6.

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.


Related in: MedlinePlus