Automated analysis of gas sensor experiment data: segment multi-round experiments, detect peak types (overshoot vs. saturation), compute rise/fall transition times, and visualize results with interactive plots.
自动化分析气体传感器实验数据：自动切分多轮实验、识别峰值类型（过冲峰/饱和峰）、计算上升/下降过渡时间，并通过交互式图表可视化结果。
- Auto segmentation — Detect experiment rounds from current peaks using Savitzky-Golay smoothing + prominence-based peak detection
- Peak type detection — Automatically distinguish overshoot peaks (过冲峰) from saturation peaks (饱和峰) using two-phase descent analysis
- Overshoot: current immediately descends after peak, then drops rapidly when gas stops
- Saturation: current plateaus near peak, drops rapidly only when gas stops
- Overshoot descent analysis — For overshoot peaks: compute I_90_Stable (steady-state current), slow descent time, and overshoot descent time
- Edge analysis — Compute rise/fall times at user-configurable thresholds (default 10%–90%) with linear interpolation for sub-sample precision
- For overshoot peaks, fall edge is computed on the rapid drop phase only (not the full descent)
- Dual-axis overlay — Optionally plot voltage or resistance on a secondary Y-axis with auto-scaling units
- GUI (PySide6) — Interactive interface with left control panel, data table, peak type indicator, and export (SVG/PNG/Clipboard)
- Customizable plots — Plot preferences dialog with four groups: Font & Text, Channel A Curve/Marker Style, Channel B Plot Settings. Configurable marker shapes, sizes, colors, and Channel B unified line width
- Channel unit selection — Independent unit override per channel: Ch A (Auto/nA/μA/mA/A), Ch B (Auto/μV/mV/V for voltage, Auto/Ω/kΩ/MΩ/GΩ/TΩ for resistance). Not persisted, resets to Auto on restart
- Cursor tracking — Mouse-following vertical dashed line with floating data label showing time + Channel A/B values at pointer position, with automatic boundary avoidance
- Axis range — X / Y1 (current) / Y2 axis range inputs (format:
min-max, e.g.100-3000). Real-time validation, applied on focus-loss/Enter. Y2 disabled when B channel empty. Applied in batch export with confirmation dialog - Batch processing — Process multiple files with peak type annotation in Excel export ("-过冲峰" / "-饱和峰")
- Image aspect ratio control (e.g. 16:9, 4:3) with automatic font/line-width scaling to maintain visual proportions
- Data base plot option — generates a clean
_base_plotsuffix image without axes, title, or legend - Axis range confirmation — prompts whether to apply custom ranges to all files
- i18n — English / Chinese UI with runtime language switching
- CLI mode — Quick command-line analysis with matplotlib output
- High-resolution export — PNG images exported at 300 DPI for publication-quality output
├── gui_main.py # PySide6 GUI application
├── analyze_core.py # Core analysis engine (peak detection + edge analysis)
├── analyze_gas_sensor.py # CLI entry point
├── settings_manager.py # Settings persistence
├── language_manager.py # i18n loader
├── language.json # Translation strings (en/zh)
├── settings.json # User preferences (auto-generated on first run)
├── LICENSE # MIT License
└── README.md
# GUI mode
python gui_main.py
# CLI mode
python analyze_gas_sensor.pynumpy
scipy
openpyxl
matplotlib
PySide6
The input .xlsx file should contain:
| Column | Content |
|---|---|
| 1 | Index |
| 2 | Time (s) |
| 3 | Voltage (V) |
| 4 | Current (A) |
| 5 | Resistance (Ω) |
| Column | Content |
|---|---|
| Round | Experiment round number |
| Peak I | Maximum smoothed current (auto-scaled unit) |
| Idle I | Baseline current (trimmed mean) |
| Response | Peak I / Idle I ratio |
| Rise Time (s) | 10%→90% rise transition time |
| Fall Time (s) | 90%→10% fall transition time (rapid drop for overshoot) |
| Peak Type | "过冲峰" (Overshoot) or "饱和峰" (Saturation) |
| Slow Descent Time (s) | Peak to I_90_Stable crossing time (overshoot only) |
| I_90_Stable | Steady-state current after overshoot slow descent |
| Response(Stable) | I_90_Stable / Idle I ratio |
| I_upper% / I_lower% | Current at rise/fall edge crossing points |
MIT