Multi-direction load cell (3 forces and the moments)

Further to consultation with a university institute wanting to analyse the different efforts and torques to which the seat and back of a wheelchair are subjected, SENSY has developed a multiaxial sensor.

Customer specifications :

Forces to be measured :

• Seat :
  • Fx = Fy = 1 kN
  • Fz = 2 kN
  • Mx = My = 100 Nm
  • Mz = 200 Nm
• Back of the wheelchair :
  • Fx = Fz = 0,75 kN
  • Fy = 1,5 kN
  • Mx = Mz = 50 Nm
  • My = 100 Nm

Accuracy: ± 0.5 %

Dimensions :

• Length = width between 200 and 250 mm
• Thickness: 100 mm maximum

Weight: less than 5 kg

Output signals: -10..0..10 V

Sensor designed :

• The outputs are produced by three connectors where the force and the moment are grouped for each direction.
• Dimensions: 220 x 220 x 60 mm
• Weight: 4.2 kg

Note: We performed linearity tests to improve the accuracy.