The dynamic weighing principle of dosing&weighing system
Technological process:
Calibration: Establish a linear relationship between mass flow rate and sensor signal using standard materials of known mass, such as glass microspheres.
Real time monitoring: During the material conveying process, sensors continuously collect signals and combine them with speed sensors (such as screw speed) to calculate instantaneous flow rate.
Closed loop control: PLC dynamically adjusts the feeder speed or valve opening based on the deviation between the set value and the actual flow rate.
Key parameters:
Flow range: 0.1 kg/h~100 t/h (depending on feeder type and sensor range).
Control accuracy: ± 0.5%~± 2% (lower than static weighing in dynamic environments).
Repeatability: The RSD (relative standard deviation) of 10 consecutive measurement results is less than 1%.
case:
Coating of positive electrode material for lithium batteries: The dynamic weighing system controls the slurry flow rate (accuracy ± 1%) to ensure that the density fluctuation of the electrode surface is less than ± 1.5%.