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Axle Strain Sensor Weighing System
Axle Strain Sensor Weighing Systems:
Precision Vehicle Weighing Technology

Axle strain sensor weighing systems offer enhanced precision and improved long-term reliability for vehicle weighing.


Technical Limitations of Traditional Weighing Systems
Inherent Defects in Measurement Principles

Current mainstream onboard weighing systems primarily employ two measurement approaches:


——Suspension Deflection Measurement: Monitors spring suspension compression to calculate load weight. This method is constrained by spring fatigue, non-linear characteristics, and temperature effects.


——Air Bag Pressure Measurement: Calculates weight through monitoring pressure changes within air bag suspension systems. While offering rapid response, air bag leakage, aging, and pressure sensor temperature drift all compromise measurement accuracy.

Long-term Accuracy Degradation Issues

Both spring and air bag suspension systems face inevitable material aging problems:

——Spring Systems:
Long-term load cycling leads to elastic modulus degradation and permanent deformation accumulation.
——Air Bag Systems:
Rubber material aging, seal performance deterioration, and internal pressure instability Sensor Drift: Temperature variations, mechanical stress, and electronic component aging cause measurement baseline drift. These factors make long-term accuracy difficult to guarantee for traditional systems, typically requiring frequent recalibration and maintenance.
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Our axle strain sensor systems achieve:

         Overall Accuracy: ±2%

Linearity: ±1%

Repeatability: ±1%

Temperature Drift: Only 0.05%


Real-time Dynamic Response:

Strain gauges provide instantaneous response to load changes, enabling real-time   weight   monitoring   during   vehicle   operation,   acceleration, and braking scenarios.

Multi-axle Integration:

Advanced systems can simultaneously monitor multiple axles, providing comprehensive vehicle weight distribution analysis and detecting uneven loading conditions that could affect vehicle stability and tire wear.

Environmental Resilience:

Strain gauge technology demonstrates excellent performance across extreme temperature ranges (-20°C to +60°C), high humidity conditions, and vibration-intensive environments where traditional sensors may fail.

Fatigue Resistance:

Unlike mechanical components in suspension-based systems, properly installed strain gauges can withstand millions of load cycles without degradation, making them ideal for high-frequency commercial applications.





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Technical Advantages of Axle Strain Sensor Weighing Systems

Direct Measurement Principle with Enhanced Accuracy

Axle strain sensors employ direct axle strain measurement to determine load weight, bypassing suspension system intermediaries:

——Simplified Measurement Chain: Load → Axle Strain → Electrical Signal Output, reducing measurement error accumulation

——Linear Response Characteristics: Metal axle elastic deformation exhibits excellent linear relationship with load

——Temperature Compensation Mechanism: Advanced temperature compensation algorithms ensure measurement consistency across different environmental conditions


Outstanding Long-term Stability

Metal vehicle axles, as load-bearing structures, possess excellent material stability:

——Stable Material Properties: High-strength steel elastic modulus remains essentially constant under normal operating conditions

——No Mechanical Wear: Strain measurement involves no moving parts, eliminating precision degradation from mechanical wear

——Self-compensation Capability: Through multi-point strain measurement and intelligent algorithms, the system provides automatic compensation and correction



Gauge Sensors

Proprietary high-precision, long-life sensors; Exclusive pre-packaging technology ensures accuracy and sensitivity;Simplified structural design for easy installation and extended service life;

Signal Amplification Circuit

High-gain amplification circuit for precise detection of one-part-per-million (ppm) changes; Superior interference resistance ensures reliable operation under complex conditions;Integrated temperature and vibration compensation maintains precision across diverse environments;

Digital Signal Processor (DSP)

Features a high-performance 32-bit industrial-grade MCU+DSP architecture for powerful real-time computing;Integrates a 12-bit high-precision ADC, achieving 0.025% resolution;High-reliability system design guarantees stable long-term operation in harsh environments;

Advanced Signal Processing Algorithms

Employs a Kalman filter-based intelligent compensation algorithm for ultra-high measurement accuracy;Utilizes adaptive parameter tracking to ensure long-term data stability;Incorporates automated pattern recognition to enhance overall system performance.
Precision Engineering
Sensors
Amplification
DSP+MCU

Algorithms
About us On-board Weighing System Provider.
Contact us
Emails：heng.wei@uc.edu
              amytong@walkhorizon.com