Potentiometric pressure transducer for yacht retractable gangway control
Find out how to control the extension of the retractable gangway for yachts
The control of the feeback movement of hydraulic cylinders
The PMI-SLE potentiometric pressure transducer controls the feeback movement of the hydraulic cylinders that are activated in the extension and closure of the yacht boarding gangway thanks to:
- optimal control of the hydraulic cylinders with a repeatability of 0.08 mm;
- IP 67 protection;
- reduced dimensions ideal also for small cylinders;
- 4-20mA current output with integrated electronic card.
Overview
- Application: position measurement for piston feedback control in the hydraulic cylinders that move the retracting gangway of the yacht, with a required repeatability of 0.1 mm.
- Product: PMI-SLE potentiometric transducer – 350 mm stroke
- Results: The PMI-SLE potentiometric position transducer enabled feedback motion control of hydraulic cylinders with a repeatability of 0.08 mm.
The process
The automatic control of the extension and closing of the boarding gangway has become very common in the most modern yachts.
To optimize the overall dimensions, the retracting gangway is telescopic, i.e. it is composed of several overlapping sections, which are able to extend or retract by a series of hydraulic cylinders.
Each hydraulic cylinder is equipped with a feedback control.
There is a need for an accurate control over the movement of the gangway, particularly during the closing phase. It is important to allow it to be retracted in the special housing only when the different extending sections are aligned, i.e. when the angle of inclination with respect to the base of the boat is zero.
The challenge
In general, the automation system is activated locally or remotely e.g. via smartphone.
The position of the pistons can be read using linear position transducers installed inside the cylinder itself, and the measurement repeatability must be at least 0.1 mm.
The automation allows to translate the position of the pistons of the cylinders into a measure of the angle of inclination.
Product benefits
PMI-SLE Potentiometric position transducer
- The potentiometric transducers for indoor PMI-SLE cylinders, with a repeatability of 0.08 mm, guarantee optimal control of the hydraulic cylinders.
- The IP 67 degree of protection and the AISI 316 stainless steel body guarantee excellent reliability in marine environments.
- The reduced dimensions allow for a comfortable installation even in small cylinders.
- The potentiometric technology guarantees a cost-effective solution for the required feature.
- The electronic board integrated in the sensor head allows to have a current output of 4-20 mA.
The solution
Position measurement for piston feedback control in the hydraulic cylinder:
PMI-SLE position transducers – 1 to 2 sensors
- Transducer stroke: 350 mm
- AISI 316 stainless steel body
- Degree of protection: IP 67
- Resistance to pressures up to 250 bar (400 bar peak)
- Repeatability: 0.08 mm
