The Force Plates

Two AMTI force plates are located in the Physiotherapy Motion Analysis Laboratory (408.1510), see Figure 1. Each plate will produce forces and moments along all three axes, giving a total of 6 channels per plate. The output voltages are fed into two strain gauge amplifiers, one for each plate with their gain set to 2000x. Table 1 and Figure 2 show the specifications for the two plates.

Table 1. Force Plate Specifications

Dimensions			Sensitivities
	inches	cm		µV/V·lb	µV/V·N		µV/V·ft·lb	µV/V·Nm
Small Plate
A	24.0	61.0	Fx	1.497	0.3365	Mx	0.9348	0.6898
B	24.0	61.0	Fy	1.514	0.3404	My	0.9372	0.6916
C	6.25	15.88	Fz	0.390	0.0877	Mz	2.406	1.509
Z*	2.1	5.33
Large Plate
A	48.0	121.9	Fx	1.505	0.3383	Mx	0.485	0.3572
B	24.0	61.0	Fy	1.491	0.3352	My	0.690	0.5092
C	6.25	15.88	Fz	0.388	0.0872	Mx	1.135	0.8376
Z*	2.04	5.18

*Note: z is the distance from the surface of the plate to the actual origin.

• Introduction to our Force Plates system
• Components of our Force Plates system
• The Force Plates
• Amplifiers
• A/D Converter
• DAQ Computer

Back to Data Acquisition Equipment