Measurement of Purse Line Tension on Hydraulic Oil Winch

Abstract

A measuring system with a built-in arithmetic unit was devised to measure the purse line tension during operation. The diameter of the winch drum, and the inlet and outlet pressures of the hydraulic oil motor were measured. The tension measured by this system and the tension measured by a three-rollers type tension meter were compared, and the accuracy of the system was evaluated.
The results show that the system measures the purse line tension to within 5% error. This accuracy is useful to reduce the error in the calculated tension caused by increasing diameter and backpressure of the motor on the purse winch. The system could be widely used to study and measure the mechanical properties of purse seine.