Weigh-In-Motion and Direct Enforcement System




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Improved Installation Scheme for Piezoelectric Quartz Weighing Sensors on Asphalt Pavement

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  1. Background Technology   Currently, WIM systems based on piezoelectric quartz weighing sensors are widely used in projects such as overload monitoring for bridges and culverts, non-site overload enforcement for highway freight vehicles, and technological overload control. However, to ensure accuracy and service life, such projects require cement concrete pavement reconstruction for the piezoelectric quartz weighing sensor installation area with the current technology level. But in some application environments, such as bridge decks or urban trunk roads with heavy traffic pressure (where the cement curing time is too long, making long-term road closures difficult), such projects are difficult to implement.   The reason piezoelectric quartz weighing sensors cannot be directly installed on flexible pavement is: As shown in Figure 1, when the wheel (especially under heavy load) travels on the flexible pavement, the road surface will have a relatively large subsidence. However, when rea
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Quartz Weighing Sensor Reliability Testing Technology for WIM systems

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  Overloading and exceeding limits of highway vehicles cause significant damage to road surfaces and pose a high risk of safety accidents, a particularly serious issue in our country where 70% of road safety incidents are attributed to vehicle overloading and exceeding limits. This results in direct economic losses of nearly 3 billion RMB, with losses from vehicle overloading and exceeding limits on highways exceeding 30 billion RMB annually. Hence, it's critically important to monitor and supervise overloaded vehicles on highways. In order to regulate vehicle overloading without disrupting traffic, the Weighting In Moving (WIM) highway dynamic weighing scheme has emerged. This system utilizes piezoelectric quartz sensors to quickly measure vehicle weight as vehicles pass over the road surface at high speeds (<120km/h) and trigger monitoring cameras for photographing. Enviko quartz sensors are specially designed for low-cost, high-performance piezoelectric quartz sensors for hig
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Key Design of Direct Enforcement Inspection Stations for Road Overload Control

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1. Introduction Illegal overloading and overloading of trucks not only destroys highways and bridge facilities, but also easily causes road traffic accidents and endangers the safety of people's lives and property. According to statistics, more than 80% of road traffic accidents caused by trucks are related to oversized and overloaded transportation. The traditional overrun and overloaded transportation checkpoint mode has low law enforcement efficiency, which is easy to cause the phenomenon of overrun vehicle omission, and the direct enforcement detection point control mode relies on the dynamic automatic weighing and detection system to automatically detect, identify and screen the passing vehicles around the clock, so as to achieve accurate and efficient control of overrun and overloaded vehicles. In order to strengthen the governance of overloaded transportation behavior, ensure the safety of highway facilities and people's lives and property, the direct enforcement sys
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