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Magnorestrictive Linear Position Measurment | Waycon

Supplier: Applied Measurement Australia

This principle enables a contactless, wear-free and absolute measurement.

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  • Range 100...4000 mm
  • Linearity of 0,02%
  • pressure up to 350 bar, positive operating pressure max. 750 bar
  • compact housing
  • IP67 Protection
  • Displacement speed < 10 m/s
  • Resolution < 0,1 mV or <0,2 μA, 5 μm (2 μm on request)
  • Working temperature range -40...+70°C
  • Vibration resistant

Analogue output 0...10 VDC, 4...20 mA, 0...20 mA, CANopen, SSI 
 
An electric impulse is produced in the headpipe and creates a circular magnetic field. The permanent magnet related to the object to be measured is the sensor. The lines of the magnetic field of the permanent magnet are in a 90° angle with the ones produced by impulse of the electric current.

The interaction of the magnetic fields causes a flexible deformation (magnetostriction) in the waveguide. This deformation spreads to either ends in the waveguide. The propagation speed reaches 2,850 m/sec. The mechanical impulse is absorbed at one end of the waveguide and changed at the other end into an electrical signal, by reversal of the magnetostrictive effect.

A controller calculates the travel speed of the impulse which is proportional to the displacement. This principle enables a contactless, wear-free and absolute measurement.

The sensors operate reliably in hydraulic cylinders, machine tools, presses, woodworking machines, rolling systems, packaging machines, portal robot, cutting machines, in the mining industry and in the conveying engineering.

There are two different types of magnetostrictive sensors. The series of MAB is used in the automated measuring technique for the position and distance measurement.

The object to be measured is connected thereby with the sliding cursor or the floating magnet. By the different installation possibilities these sensors are suitable for a multiplicity of applications. The series of MAZ is conceived for the installation in hydraulic cylinders.

The ring permanent magnet move along a rod without any contact. The different execution of the ring magnets permits a simple installation in hydraulic systems. The sensors can be installed in systems with pressure up to 350 bar (overpressure 700 bar).

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