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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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