Modern BlackVue dashcams are equipped with several built-in sensors that play crucial roles in safety, surveillance, and event recording automation. Understanding how each sensor works will help you maximize the effectiveness and reliability of your dashcam.
Note: Screenshots in this guide are based on the BlackVue app and may vary slightly depending on your camera model or app.
1. Shock/Impact Sensor (G-sensor or accelerometer)
Purpose:
Detects sudden impacts, shocks, or abrupt movements to trigger event recordings.
How it works:
- Measures movement along three axes: up/down, side-to-side, and front/back.
- Triggers an “Event file” whenever a collision, abrupt stop, or bump is detected.
- Used for both driving (accidents, hard braking) and parking mode (hit-and-runs, vandalism).
Features:
- Sensitivity is user-adjustable via the app or BlackVue Viewer.
- Too high: May record unnecessary events from road bumps.
- Too low: May miss collisions or impacts.
Records as:
Event file (protected from overwrite), separate from normal footage.
2. Motion Sensor (Video/image-based)
Purpose:
Detects movement in front (and optionally rear/interior) of your vehicle during parking mode.
How it works:
- Continuously analyzes video frames for motion in the dashcam’s field of view.
- Saves a video file only when movement (people, cars, animals) is detected.
- Adjustable detection region and sensitivity to avoid false triggers (e.g., passing trees or distant traffic).
Features:
- Decreases SD card space used, as only important activity is saved.
- Used in Motion & Impact Detection Parking Mode.
- Time-lapse parking mode ignores motion and records continuously at low frame rate.
Records as:
Parking file (usually marked “P”) and, if an impact occurs, an additional event clip.
3. Proximity/Touch Sensor
Purpose:
Provides a quick and contactless way for the driver or passenger to manually trigger important functions.
How it works:
- Located on the front camera, usually near the Wi-Fi or status LED.
- Activated by waving a finger or lightly tapping within 20mm of the sensor area.
- Default setting: Toggle audio recording on/off.
- Can also be customized (via app or firmware) to trigger a manual event recording or be disabled.
Features:
- Allows immediate creation of a protected manual file without using the app or buttons.
- Especially useful for recording unexpected events or checkpoints on the road.
Quick Features Comparison Table
| Sensor | Main Use | Typical Triggers | Recording Type | Adjustable? |
|---|---|---|---|---|
| Shock | Impact/event detection | Accidents, bumps, rapid stops | Event file (protected) | Yes (sensitivity) |
| Motion | Movement during parking | People, vehicles, activity | Parking file/event file | Yes (region/sensitivity) |
| Proximity | Manual trigger/control | Wave/tap sensor area | Manual recording/audio on/off | Yes (function selection) |
Best practices & tips
- Adjust G-sensor sensitivity in both driving and parking modes for accurate event capture.
- Set motion regions to avoid false positives (e.g., windy trees, distant roads).
- Test proximity sensor so you can confidently use it for manual file creation when needed.
- Regularly review recordings and adjust settings as your parking/driving environment changes.
These built-in sensors automate crucial dashcam functions, ensuring you never miss an important moment—whether you’re driving, parked, or need to record something manually for later review.