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Table 2 MR_CHIROD's Component Details

From: fMRI-compatible rehabilitation hand device

Name

Material

Description

ERF Resistive

Element Electrodes

Aluminum

Supply the necessary electric field to activate the ER fluid

ERF Resistive

Element Case and Lid

Nylon

Housing of the ERF and electrodes

Power Trans. Shaft

Aluminum

Output shaft of ERF resistive element;

Coupled to gear system;

Optical Encoder shaft

Handles

Garolite

Haptic interface for the patient

Gear System

Brass

Multiplies the ERF resistive torque

Bearing

Plastic

Aligns the ERF case and gearbox

Plain Bearing

Brass

Aligns the electrodes;

An electrical contact for the rotating electrode

Transmission Bracket

Aluminum

Rotates with ERF housing;

Transmits hand force to gearbox

Seals

Teflon®

Prevents leakage

Screws, nuts, and washers

Plastic and Brass,

Fastener

Optical Encoder

Plastic

Renco Low-Profile Encoder with 1024/revolution resolution;

Measures position, which is used to calculate velocity and acceleration

Force Sensors

Aluminum

FUTEK Load Cells, 10 lb Measures resultant torque of the ERF resistive element