Product

Line Laser Scanning Sensor

Single-line laser scanning sensor with wide angular coverage — built for near-field robot obstacle avoidance.

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QianEasy Line Laser is a single-line laser scanning sensor: it projects an invisible near-infrared line and measures range along a wide angular sector. Unlike multi-line or solid-state LiDAR meant for mapping, it is optimized for front-mounted obstacle detection on mobile robots — vacuum cleaners, indoor service platforms, and other specialized bases that need fast, reliable near-field geometry.

Single-line laser scanning sensor module
Compact single-line laser module for robot front obstacle sensing.

What it is

A structured-light / triangulation line scanner: the laser stripe crosses the scene; the onboard imaging path recovers distance and azimuth of obstacles within the fan. Typical install is at the robot nose, with a slight downward pitch so the line sweeps the floor plane ahead of the chassis — catching furniture legs, thresholds, and low clutter before collision.

Front mount side view and top FOV for obstacle avoidance
Reference install: side view (height / ground hit) and top view (FOV + IR line on a vacuum-class robot).

What it solves

Wheel LiDAR and navigation cameras cover mid-range space, but bumpers still need a dedicated near-field layer. Line laser fills that gap with high update rate and wide FOV, so the control stack can slow, steer, or reverse before contact — especially in cluttered homes and corridors where centimeter-class front geometry matters.

Near-field obstacle detection in front of a robot vacuum
Near-field structured line for obstacle distance and bearing ahead of the platform.

Key capabilities

  • Single-line angular scan — wide fan (typ. 120°) for front obstacle coverage
  • Near-field ranging — short working distance suited to bumper / chassis clearance
  • Ambient-light resilience — designed for bright indoor scenes (up to ~50k Lux class)
  • Robot-friendly I/O — I2C / UART class interfaces into MCU or perception boards
  • Eye-safe NIR — Class 1 laser safety (IEC 60825-1) on reference packages

Typical specifications (reference module)

Values below describe a typical obstacle-avoidance package; wavelength, range band, and housing can be tuned per project.

Sensing type Single-line laser scanning / structured-light ranging
Laser source NIR line laser (typ. 808–850 nm)
FOV 120°
Pitch (install) ≈15° ±2° downward (application dependent)
Ranging range Typ. 30–300 mm (white target); short-band packages ≈20–120 mm
Frame / sample rate Typ. ≥20 Hz / ≈20 fps
Angular resolution Typ. ≈0.75° (package dependent; <1.2° class)
Ambient light Up to ≈50,000 Lux
Data interface I2C / UART
Supply 5 V
Operating temp. −10°C ~ +45°C (humidity per package)
Storage temp. −30°C ~ +70°C
Module size Typ. 28 × 21.3 × 10.8 mm
Laser safety Class 1 (IEC 60825-1:2014, 3rd ed.) on reference SKUs
Module life Typ. ≥3,000–10,000 h (package dependent)

Mounting guidance (vacuum / mobile robot)

  • Install at the front of the chassis; laser line roughly horizontal toward the ground plane ahead.
  • Reference geometry: mount height ≈55 mm, ground intersection ≈205 mm forward (tune with pitch and robot clearance).
  • Align so the camera FOV covers the projected IR line; the controller then estimates obstacle distance and azimuth for avoidance.

Where it fits in QianEasy stacks

In robot vacuums and other indoor mobiles, line laser is the near-field bumper sensor. In wheelchair, golf-follow, and pool platforms it complements TOF / array LiDAR: LiDAR for mid-range space, line laser for immediate front geometry that must not be missed.

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