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Enviko weigh-in-motion (WIM) solutions

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  Enviko weigh-in-motion (WIM) solutions Mainly consists of quartz crystal sensors, a charge amplifier, a weighing controller, a front-end processing unit, dynamic weighing management software, and power supply equipment. When a vehicle passes through the dynamic weighing system, the sensors collect waveform data. The charge amplifier (data acquisition unit) captures, converts, and amplifies the signal, while the weighing controller calculates and generates the vehicle's weight data. The weighing system can monitor all vehicles passing through the weighing area without affecting normal traffic. By combining license plate and vehicle type information with preset overload standards in the processing unit, it automatically identifies overloaded vehicles. Operating 24/7, the system continuously detects vehicle information such as axle count, axle weight, and gross weight, and determines overload status based on the latest regulations. The system also includes a speed detection functio...
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Comparison of Key Features of Weigh-In-Motion Sensors

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The three mainstream types of Weigh-In-Motion (WIM) sensors ： Quartz (Enviko and others), Plate Type, and Strip Strain Gauge, each have their own characteristics. Below is a comparative analysis of their features.   Quartz Piezoelectric sensors use the piezoelectric effect, offering high-frequency response, a wide measurement range, compact size, easy installation, and no power supply requirement. They work well for speeds from 1-200 km/h, have excellent long-term stability, low maintenance costs, and a lifespan of 5-10 years. Plate Type sensors use strain resistance technology and are suitable for low-speed (0-40 km/h) or static weighing. Accuracy decreases above 30 km/h. Installation requires a large foundation pit, leading to long construction times, significant traffic disruption, high maintenance costs, and a short lifespan of 1-3 years. Strip Strain Gauge sensors are designed for medium to low-speed weighing (1-60 km/h) but become less accurate above 40 km/h. Installa...
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Weigh-In-Motion Standards Comparison between China GBT 21296 and OIML R134

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  Weigh-In-Motion Standards Comparison between China GBT 21296 and OIML R134 WIM Comparison between China GB/T 21296 and OIML R134 Comparison Item OIML R 134-1 China GB/T 21296 Remarks Weighing Classification No explicit classification based on speed. Classified by speed: Low-speed (≤10 km/h) , Medium-speed (10–40 km/h) , High-speed (40–100 km/h) GB/T 21296 defines three categories based on speed, adapting to different traffic and operational conditions. OIML R 134-1 focuses on dynamic weighing but does not specify speed ranges Vehicle Mass Accuracy Classes 6 accuracy classes: 0.2 , 0.5 , 1 , 2 , 5 , 10 6 basic accuracy classes: 0.2 , 0.5 , 1 , 2 , 5 , 10 ; Two additional classes: 7 , 15 China’s standard adopts the 6 classes from OIML R 134-1 and introduces 2 additional classes for lower-precision applications Ax...
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