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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.


Response of the sensor after an applied force vanishes.
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f8-sensors-07-01530: Response of the sensor after an applied force vanishes.

Mentions: From the equation (18), it can be seen that first the immediate drop from unloading is of the same magnitude as the initial jump from loading, namely the elastic strain ε0 as shown in Fig. 6. The resilience process is fast. Then the speed of resilience slows down obviously. The sensor response after an applied force vanishes is shown in Fig.8. Thus rubber does not return to the original length when a vehicle just passes over the platform.


Design of a Capacitive Flexible Weighing Sensor for Vehicle WIM System
Response of the sensor after an applied force vanishes.
© Copyright Policy
Related In: Results  -  Collection

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

f8-sensors-07-01530: Response of the sensor after an applied force vanishes.
Mentions: From the equation (18), it can be seen that first the immediate drop from unloading is of the same magnitude as the initial jump from loading, namely the elastic strain ε0 as shown in Fig. 6. The resilience process is fast. Then the speed of resilience slows down obviously. The sensor response after an applied force vanishes is shown in Fig.8. Thus rubber does not return to the original length when a vehicle just passes over the platform.

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.