Product News | User-Developable 2D Single-Line TOF Navigation & Measurement LiDAR
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- Zoe
- Issue Time
- Nov 5,2024
Summary
Since DADISICK introduced its innovative single-line TOF LiDAR, this technology has demonstrated its strong potential in various industries, including autonomous vehicles, intelligent robots, automated guided vehicles (AGVs), and digital multimedia.
LiDAR Core Technology—HQPC
Since DADISICK introduced its innovative single-line TOF LiDAR, this technology has demonstrated its strong potential in various industries, including autonomous vehicles, intelligent robots, automated guided vehicles (AGVs), and digital multimedia.
Understanding Point Cloud Technology
The term "point cloud" may sound technical, but it actually describes a very intuitive concept. LiDAR measures distances by emitting laser pulses and receiving the reflected light, with each measurement point representing a specific distance value. When these points are connected in sequence, they form an outline of our surrounding environment. The quality of the point cloud depends on several factors, including measurement accuracy, point cloud stability, and density. These factors collectively determine the performance of the LiDAR image: Are straight lines truly straight? Do right angles approximate 90°? Are details accurately captured? These are key indicators for evaluating point cloud quality.
The Core Importance of Point Cloud Quality
In LiDAR technology, point cloud quality is its most fundamental and critical characteristic. DADISICK is committed to enhancing the range measurement performance of LiDAR to ensure that our customers receive high-quality point cloud data. Our LiDAR models LD-10H, LD-20H, and LD-30H are all integrated with HQPC technology.
In-Depth Look at HQPC Technology
HQPC, or High-Quality Point Cloud technology, represents a breakthrough in LiDAR technology. The core of this technology lies in the LIDAR TOF chip solution, which achieves precise time measurements within the chip through control of the chip's underlying link and proprietary algorithms. Currently, HQPC technology supports a time resolution of 16 picoseconds (ps), allowing for multi-line (up to 16 lines) parallel measurements, pulse width measurement, and self-calibration capabilities.
Single-line TOF Scanning Laser Radar Overview
The LD-30H is designed based on the Time of Flight (TOF) principle, which utilizes precise time measurements of laser pulse reflections to obtain high-accuracy distance information. With motor rotation, it performs a 2D scan of the surrounding environment.
The LD-30H enables reliable measurements within a range of 30 meters and covers an angular range of 270°. Thanks to the advantages of the TOF solution and DADISICK's proprietary high-performance time measurement technology, the LD-30H delivers significantly better distance measurement performance than triangulation-based radars. It achieves a measurement accuracy of ±30 mm even when measuring a whiteboard at a distance of 30 meters.
The LD-30H supports an industry-leading laser sampling frequency of 45 kHz, producing up to 45,000 point cloud data points per second, allowing for highly detailed reconstruction of the surrounding environment. Users can configure the motor speed to adjust the frame rate of the output point cloud image between 10 and 30 Hz. Additionally, with an angular resolution as high as 0.08°, the LD-30H significantly enhances the detection of small targets, effectively reducing the missed detection rate.
Note: The angular output range is 0° - 360°. When the angle falls within the display's 90° range (0°-45°, 315°-360°), point clouds are also output with a distance value of 0. "Physical Point Cloud Count" refers to the actual number of points output, while "Effective Point Cloud Count" refers to the number of points selected by the user within the specified range.
The LD-30H provides point cloud data over a 270° range, with the 180° position directly in front of the sensor, indicated by the triangular mark on the top. From a top-down perspective, the angle increases counterclockwise. The LD-30H has a 90° blind spot spanning from 315° to 45°.
With the control software provided by DADISICK, users can conveniently initiate system-level development. The LD-30H can be applied in fields such as robotic positioning and navigation, mapping, environmental modeling, and security.
Working Principle
The LD-30H is a TOF radar that comprises optical, mechanical, electronic, and software components. During operation, the laser emits a beam, which reflects upon hitting an object. The receiver detects the reflected light signal, and the time analysis module measures the time difference between the emitted and reflected light. By multiplying this time by the speed of light, the distance traveled by the light is calculated, allowing the position of the target object to be determined, as shown in Figure 1.
Single-point fixed-position measurements can only obtain the target's distance information. To capture information from multiple angles, the LD-30H is equipped with a rotating motor. As the motor rotates, it measures distances at various angles, thereby stitching together a contour image of the surrounding environment.
Below is an example of the image captured by the LD-30H:
Recommend DADISICK TOF LiDAR
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Basic Information
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Product Name | Single-line TOF Scanning Laser Radar | ||
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Models
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LD-10H
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LD-20H |
LD-30H
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Measurement Characteristics | |||
Detection Range @ 90% Reflectivity | 10 m | 20 m | 30 m |
Detection Range @ 10% Reflectivity | 5 m | 8 m | 10 m |
Measurement Accuracy | ±30 mm | ||
Scan Angle | 270° | ||
Point Cloud Merging | 1/2/4/8 points | ||
Scan Frequency | 10-30 Hz | ||
Minimum Angular Resolution | Min 0.08° (adjustable) | ||
Optoelectronic Characteristics | |||
Operating Voltage | DC12 V - 24 V | ||
Operating Current | 0.21 A/12 V (typical) | ||
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Laser Source
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905 nm, class I
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Power Consumption | 2 W | ||
Other | |||
Data Transmission Interface | Ethernet 100BASE-TX | ||
Startup Time | < 10 s | ||
Indicators | Power indicator light / Status indicator light | ||
Ambient Light Resistance | > 50,000 lux | ||
Operating Temperature | -10 °C to +55 °C | ||
Storage Temperature | -30 °C to +75 °C | ||
Humidity | < 80% | ||
Service Life | 5 years (without battery) | ||
Vibration Resistance | |||
Vibration | 10-55 Hz, amplitude 0.75 mm, XYZ axes, each axis 2 hours; 50-200 Hz, 196 m/s² (20G), scan frequency 2 min/cycle, XYZ axes, each axis 4 hours. | ||
Protection Level | IP65 | ||
Dimensions | 50 × 50 × 76 mm | ||
Weight | 148 g (excluding cable) | ||
Related Laser Scanning Radars
5m distance, A technique that uses a laser beam to measure distance and create detailed maps of objects and environments.
20m distance, A technique that uses a laser beam to measure distance and create detailed maps of objects and environments.
Sensing range 20m, A technique that uses a laser beam to measure distance and create detailed maps of objects and environments.
LD-100R is mainly designed for reflector-based AGV navigation, also used for scene measurement applications.