Laser ranging sensors have achieved deep applications in multiple fields due to their high precision, non-contact, and fast response characteristics. The following are typical application scenarios and scene analysis:

1、 Industrial Manufacturing and Automation

1. Size and displacement detection

Scenario: Measurement of aperture and flatness of automotive components such as engine cylinder blocks and gears; PCB board warpage detection; Calibration of cutting dimensions for lithium battery electrodes.

Principle: Real time monitoring of workpiece size changes with an accuracy of micrometer level using triangulation or laser interferometry.

Case: On the automobile welding line, laser ranging sensors detect body gaps to ensure welding accuracy.

2. Logistics and Warehouse Management

Scenario: Height and volume measurement of goods in intelligent warehousing; Conveyor belt material position calibration; AGV (Automated Guided Vehicle) obstacle distance detection.

Principle: ToF or phase shift method, to achieve fast measurement at long distances (over 10 meters).

Case: Amazon warehouse uses ToF LiDAR to scan goods and automatically calculate volume to optimize storage space.

3. Processing and assembly monitoring

Scenario: Depth control of CNC machine tool machining; Measurement of semiconductor wafer thickness; Real time adjustment of 3D printing layer thickness.

Principle: Interference measurement method or spectral confocal method, meeting the requirements of nanometer level accuracy.

2、 Architecture and Civil Engineering

1. 3D modeling and surveying

Scenario: Scanning of building facades, digital protection of ancient buildings, monitoring of tunnel excavation contours.

Equipment: 3D laser scanner (such as FARO Focus), based on ToF principle, can collect millions of point cloud data per second.

Case: the Mogao Grottoes of Dunhuang use laser ranging technology for three-dimensional modeling of murals to prevent the loss of cultural relics from weathering.

2. Construction and safety monitoring

Scenario: Bridge deflection detection, high-rise building settlement monitoring, foundation pit slope displacement warning.

Principle: High precision ToF or phase shift method, combined with GPS to achieve millimeter level displacement monitoring.

3、 Consumer Electronics and Smart Home

1. Mobile phones and smart devices

Scenario: The LiDAR of the iPhone Pro series is used for AR ranging and depth calculation in portrait mode; Obstacle avoidance and map construction for robotic vacuum cleaners.

Principle: Short distance ToF or phase shift method, integrated with miniaturized modules (such as STMicro's VL53L1).

2. Smart Home

Scenario: Intelligent toilet seat human proximity detection, projector autofocus, intelligent mirror distance measurement interaction.

Features: Low power consumption, miniaturization, mostly using infrared lasers (such as 940nm wavelength) to avoid human eye interference.

4、 Transportation and Autonomous Driving

1. Car LiDAR

Scene: autonomous vehicle environment perception (obstacle distance, lane line recognition); Intelligent traffic flow monitoring.

Principle: Multi line ToF LiDAR (such as Velodyne VLS-128) constructs a 360 ° environmental point cloud through rotational scanning.

Case: Tesla's FSD system is equipped with LiDAR to achieve automatic obstacle avoidance on highways.

2. Rail Transit

Scenario: Wear detection of high-speed rail wheelsets, measurement of gap between trains and platforms; Railway tunnel limit detection.

5、 Medical and scientific research

1. Medical equipment

Scenario: Corneal thickness measurement during ophthalmic surgery (such as femtosecond laser myopia correction); Tumor localization in radiotherapy equipment.

Principle: Spectral confocal method or interferometric measurement method, to meet the high-precision non-contact measurement of biological tissues.

2. Scientific research experiments

Scenario: Particle velocity measurement in fluid mechanics (PIV technology); Monitoring of Thin Film Growth Thickness in Materials Science.

6、 Security and Surveillance

1. Perimeter defense

Scenario: Intrusion detection in areas such as airports and prisons, using laser ranging to demarcate virtual warning lines.

Principle: ToF or phase shift method is used to achieve motion target recognition at a distance of hundreds of meters.

2. Drone obstacle avoidance

Scenario: Front/rear obstacle avoidance for consumer grade drones (such as the DJI Mavic series) to avoid colliding with obstacles.

7、 Agriculture and Environmental Monitoring

1. Precision agriculture

Scenario: drone crop height measurement, fruit tree spacing planning; Monitoring of plant growth height in greenhouse.

Equipment: Lightweight ToF sensor integrated into agricultural drones or robots.

2. Environmental monitoring

Scenario: debris flow and landslide warning, measurement of glacier thickness changes; Lidar remote sensing of atmospheric pollutants (such as differential absorption lidar DIAL).