Bill of Materials

This section is split into each individual component of the sensor. A generic name is provided with the supplier for ease of substitution. Every item can be replaced at your own discretion.

Conductive Rubber

3D Printed Parts

These parts can be printed with ABS or PLA. They are designed to require minimal support material.

• Mold body (Download)
• Syringe attachment (Download)

Casting Materials

• 3 mm chopped carbon fiber (.125" Chopped Carbon - 1 lb - Amazon)
• Rubbing alcohol (not pictured, any generic household rubbing alcohol works)
• Shore 25 A platinum cure silicone rubber (Platsil Gel-25 - Brick in the Yard)
• 10 ml Syringe (10ml Oral Syringe - Amazon)
• Stirring sticks (Mixing sticks - Brick in the Yard)
• Mixing cups

Mold Parts

• 4 mm steel rod (Low-Carbon Steel Rod - McMaster Carr)

Equipment

• Multimeter or Ohmmeter (not pictured)
• Precision weight scale with 0.01 g resolution (AMIR Digital Kitchen Scale, 500g/0.01g - Amazon)

Sensor Body

3D Printed Parts

These parts can be printed with ABS or PLA. They are designed to require minimal support material.

• Mold body (Download)

Casting Materials

• Shore 25 A platinum cure silicone rubber (Platsil Gel-25 - Brick in the Yard)
• Stirring sticks (Mixing sticks - Brick in the Yard)
• Mixing cups
• Conductive rubber ends
• 4 mm OD - 2 mm ID semi-clear silicone tubing (PUTC4-10 - MiSUMi)
• Silicone adhesive (Silpoxy - Smooth-on)

Mold Parts

• 4 mm steel rod (Low-Carbon Steel Rod - McMaster Carr)

Equipment

• Weight scale (AMIR Digital Kitchen Scale, 500g/0.01g - Amazon)

Conductive Fluid

Materials

• Table salt
• Water
• Food coloring

Equipment

The equipment listed here is simply what we had at hand during the project, each instrument can be replaced with any equivalent piece of hardware.

Sensing Pressure

Digital

• Pressure sensor (ABPMANT100PG2A3 - Mouser) (I²C)
• Microcontroller (Teensy 3.5 - PJRC)

Analog

• Pressure sensor (ABPMANN004BGAA5 - Mouser) (0 - 5 V)

Sensing Resistance

• Data acquisition device capable of +-5V analog output (NI USB-6351 - National Instruments)
• Assorted resistors, should cover at least 1 kOhm to 1MOhm range (Resistors - Amazon)

Bibliography

Preechayasomboon et. al. Multi-Modal Sensing and Actuation in Biomechanical Hydraulic and Pneumatic Systems. 

Export Citation

Contributors

Pornthep Preechayasomboon

Gaurav Mukherjee

Eric Rombokas