Huggak/February26_CandleGel_Pump_Experiment

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license: cc-by-nc-4.0
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# 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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