VibroNav/May26_CandleGel_Pump_Experiment

Main Protocol

Performer: Kuba

Purpose / Hypothesis

Whether pulse can be detected instead of needle depth

---

Equipment and Setup

• Needle size: 22G
• Needle tip: Quincke
• Used sensor: M.4.4.1.22G
• Punctured material: Candle gel

Phantom setup:
A fully filled tube embedded inside a angled surface candle gel box. We needed needle tip distances relative to the tube, with different needle depth in the same time. For this purpose, a candle gel box with an embedded tube was built.

---

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. In highest point due to angled-surface configruation.

---

Measurement Points

For each column and each row many recordings were made for different distane from needle tip to tube center.

Each consecutive recording 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).

The starting point in the Z axis was different for columns due to angled-surface.

---

Surface Measurement Pattern

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

Grid Layout

• 6 columns: e, f, g, h, i, j
• 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

---

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

---

Filename Meaning

Example filename:
e10_0.5_Foam_Speed-3_22g_quincke_120mm_M.4.4.1.22G_2026-06-11_11.29.04.wav \

Format:
column-row_distanceToTubeInCMS_material_speed_needle-type_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

---