An MR-Compatible force sensor composed of cheap, off-the shelf components.
Total price = 102 USD (the price of each component is indicated in the BOM.ods file on the github)
Open ForceSense MR: An Open-Hardware MR-Compatible Force Sensor
This project contains the instructions for the building of the OpenForceSense MR force sensor, an MR-Compatible force sensor composed of cheap, off-the shelf components. This sensor, the associated files, the arduino firmware, and the host software included in this repository is opensource, distributed under the GNU General Programming License (GPL) v3.
In this current embodiment, the sensor is composed of 4 20-kgf parallel beam load cells mounted on a custom aluminum frame, thus having a maximum load capacity of 80kgf (784N), and an arduino shield built around the standard HX711 amplifier. In order to make the sensor MR-compatible, nonmagnetic materials are used, and accurate electromagnetic shielding is used to minimize the effects of interference from the MR components.
1Department of Radiology, Division of Radiological Physics, University Hospital Basel, Basel, Switzerland.