Onboard Weighing System
On-truck load estimation or measurement, commonly using hydraulic pressure or strain sensors, for overload awareness, process checks and operating data.
Definition
An onboard weighing system measures loads during handling rather than requiring a separate scale visit. Hydraulic pressure offers a simpler retrofit with condition-dependent accuracy; strain-based fork or carriage sensors can offer better repeatability at higher cost and installation complexity. Weight supports safety, loading checks and meaningful workload analysis.
Measurement Methods
Pressure systems infer load through the lifting circuit and are affected by oil temperature, mast friction, tilt, lift speed and leakage. They need defined measuring conditions and compensation. Strain sensors measure structural force more directly but need engineered installation and protection against impact and contamination.
Accuracy Constraints
Floor slope, load position, mast angle, motion and temperature affect readings. Follow the calibrated level and stable measurement procedure. Process weighing should not be assumed suitable for legal-for-trade use; verify the instrument's approval and applicable verification requirements before such use.
Overload Protection
Visible weight helps operators recognize unexpectedly heavy goods, but weight alone does not establish safe capacity. Combine it with load centre, lift height and the approved capacity chart. Appropriate integrated systems can warn or restrict actions near limits.
Business and Analytics
Weight can assist inbound checks, cumulative loading and quantity discrepancy detection. It improves workload metrics beyond trip counts and permits energy normalization by handled mass. Linked safety events help identify demanding load patterns.
Calibration and Maintenance
Use known reference loads under the specified conditions and record results. Recalibrate after relevant repairs, fork or attachment changes, sensor impacts or observed drift. Inspect hydraulic condition or strain-sensor protection and wiring; routine reference checks help catch gradual errors.
Frequently Asked Questions
Can onboard weighing replace a fixed scale?
It depends on required accuracy, operating conditions and any required approvals. Many systems are intended for process control rather than settlement measurement.
Does weighing prevent all overload risks?
No. Capacity also depends on load centre, height and configuration, and an uncalibrated reading can be misleading.
Related Terms
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This glossary covers general industry concepts for technical reference and knowledge sharing. It contains no proprietary information from any specific manufacturer. For equipment specifications and operating procedures, always refer to the OEM documentation.