VibroNav/February26_CandleGel_Pump_Experiment

Main Protocol

Performer: Hamza

Purpose / Hypothesis

Whether pulse can be detected. Whether distance to tube can be estimated basen on signal.

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Equipment and Setup

• Needle size: 22G
• Needle tip: Quincke
• Used sensor: M.4.4.0.22G
• Punctured material: Candle gel

Phantom setup:
A fully filled tube embedded inside a candle gel box. We needed needle tip distances relative to the tube, not the surface of the material, in order to compare the distance for level measurements.
For this purpose, a candle gel box with an embedded tube was built.

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Experimental Setup

• Tube size: 10 × 8 mm
• Pump speed: 22 rpm
• Measurements performed at room temperature

Distances

• Vertical distance from tube center to bottom of box: 3.5 cm
• Distance from tube center to top surface: 6.3 cm
• Candle gel surface begins at a radial distance of 6.3 cm from the tube center.

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Measurement Points

All measurement points are defined relative to the tube center.

• P2 is the outermost point (needle tip 5 mm inside the gel).
• Located 5.8 cm from the tube center.
• Each subsequent point moves toward the tube center with 5 mm (0.5 cm) spacing.

During tube recording the needle was moved until 8 mm distance from the tube surface, which is why recordings exist only up to P12.

Radial Distances

Point	Distance from Tube Center	Total Needle Shaft Inside
P2	5.8 cm	5 mm
P3	5.3 cm	10 mm
P4	4.8 cm	15 mm
P5	4.3 cm	20 mm
P6	3.8 cm	25 mm
P7	3.3 cm	30 mm
P8	2.8 cm	35 mm
P9	2.3 cm	40 mm
P10	1.8 cm	45 mm
P11	1.3 cm	50 mm
P12	0.8 cm	55 mm
P13	0.3 cm	60 mm
P14	−0.2 cm	65 mm
P15	−0.7 cm	70 mm
P16	−1.2 cm	75 mm
P17	−1.7 cm	80 mm

Each consecutive point is separated by 5 mm along the radial direction toward the tube center.

The distance to the tube in the Z axis in the recorded signal can be taken from the filename (see Filename Meaning section).

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Surface Measurement Pattern

Measurements were performed on a grid placed on the candle gel surface.

Grid Layout

• 3 columns: j, h, f
• Each column contained 11 rows (10 rows + tube row)

The central row corresponds to the row where the tube is located:

• 5 rows above the tube
• 5 rows below the tube

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Row Spacing

• 10 mm spacing between most adjacent rows (1–5, 6–10)
• 15 mm spacing between:
  • row 5 and tube
  • tube and row 6

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Filename Meaning

Example filename:
h1_5.8_candlegel_22g_quincke_M.4.4.0.22G_2026-03-03_16.28.39.wav \

Format:
column-row_distanceToTubeInCMS_material_needle-gauge_tip_sensor-type_timestamp

distanceToTubeInCM/S

• Measured in the Z axis
• Independent distance originating from the row

Additional notes:

• Sensor placed on channel 0
• Channel 1 not connected

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Needle Tracking Protocol

• Marker size: 4 cm
• Marker border size: 1 cm

Offsets:

• Needle offset: 9.2 cm
• Z-offset: 0.95 cm

Distances:

• Tube center to table surface: 50 mm
• Tube center to gel surface: 63 mm
• Gel surface to table: 114 mm

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