Testing and Evaluation

Requirements:

The selected pump shall:

1. Output 30 to 80 mL/min.
2. Provide the ability to deform skin 1 mm
3. Output continuous suction
4. Be manually operable
5. Shall interface with silicone tubing
6. Shall output flow rate readings

Data:

• Perform functional tests on simple materials (saran wrap, paper, clay) to familiarize with pump function
• Determine necessary range of pressures by comparing with expected data and defining subset of skin conditions to test.

Requirements:

The manufactured cups shall:

1. Allow for 1mm deformation of skin
2. Be manufacturable within Stevens’ capability
3. Provide a seal to avoid suction leaks
4. Weigh less than 5 grams
5. Cost less than $5/cup to manufacture
6. Have dimensions within 1% tolerance of design goal

Data:

• Measure specifications to address requirements 2,4,5,6
• Set deformation of 1 mm for simplified tests discussed in pump data collection. Measure tolerances for boundaries.
• Record pressures and compare to expected data to observe for leaks, after measuring qualitatively.

Requirements:

The data collection subsystem shall:

1. Accept two pressure values
   • One from pump, one from sensor inside cup
2. Calculate pressure differential
3. Use pressure differential to calculate the mechanical properties of the skin
4. Output skin mechanical properties

Data:

• Bottom up testing methodology
• Collect readings, then evaluate accuracy
• Compare algorithmic solvers with mathematical calculations.