Sony FCB camera block
In scenarios such as industrial inspection and infrastructure patrol inspection, the accuracy and stability of long-distance measurement directly determine the reliability of the system.
The SONY A-DT1 LiDAR, through dToF technology optimization and multi-dimensional anti-interference design, has achieved a breakthrough performance with an error of ±5 centimeters within a range of 40 meters (indoor) and 20 meters (outdoor), redefining the long-distance measurement standard of miniaturized LiDAR.
This article will conduct an in-depth analysis of its technical architecture and scene adaptation capabilities, revealing how it balances long-distance accuracy and compact design.
1.Long-distance measurement performance indicators
Indoor long-distance measurement: In an indoor environment, the SONY AS-DT1 can achieve an accurate ranging of up to 40 meters, with an error controlled within ±5 centimeters. It can penetrate obstacles such AS warehouse shelves and building partitions, meeting the requirements of large-scale warehousing, indoor navigation and other scenarios.
Outdoor strong light environment: Under the condition of strong light (100,000 lux) in summer, the outdoor ranging capability of AS-DT1 can reach 20 meters. It is suitable for open-air scenarios such AS bridge inspection and highway patrol inspection, and can maintain stable performance under high brightness interference.
Dynamic range expansion: Through SONY’s self-developed multi-band laser emission technology, the AS-DT1 can adaptively adjust the laser power to achieve high-precision measurement within 10 meters (with an error of ±5 centimeters), maintain centimeter-level resolution within a range of 40 meters, and meet the requirements of both short and long distances.
2. Core technologies support long-distance performance
Single Photon Avalanche Diode (SPAD) sensor
The SPAD sensor amplifies a single incident photon signal to a detectable level through the avalanche multiplier effect, significantly enhancing the ranging capability of low-reflectivity objects.
At a distance of 40 meters, the SONY AS-DT1 can still capture the reflected signals of low-reflectivity objects such AS ferrous metals and dark coatings, avoiding the missed detection problem of traditional LiDAR.
Direct Time-of-Flight (dToF) technology
By precisely measuring the round-trip time of laser pulses, dToF technology can eliminate ambient light interference and improve the signal-to-noise ratio of long-distance measurements.
The dToF module of SONY AS-DT1, combined with SONY’s Time-to-Digital Converter (TDC), has a time resolution of picosecond level, ensuring the accuracy of long-distance measurement.
Multipath interference suppression algorithm
In long-distance measurement, laser signals are vulnerable to interference from environmental noise. SONY AS-DT filters scattered signals such AS rain, snow and dust through algorithms to ensure data reliability.
In bridge inspection, sensors can penetrate vegetation occlusion and accurately identify cracks in bridge piers, reducing the false alarm rate.
3. Long-distance application verification in complex scenarios
Infrastructure inspection
In scenarios such AS Bridges and DAMS, the 40-meter indoor ranging capability of SONY AS-DT1 can penetrate the internal structure of buildings to detect minor defects such as concrete cracks and steel bar corrosion.
The outdoor 20-meter ranging capability can cover targets such as highway guardrails and tunnel linings, improving inspection efficiency.
Unmanned aerial vehicle inspection
The unmanned aerial vehicle (UAV) equipped with SONY AS-DT1 can scan the building facade at a height of 40 meters and generate a three-dimensional model with centimeter-level accuracy. It is suitable for the protection of ancient buildings and high-rise fire reconnaissance.
In power inspection, sensors can penetrate vegetation to identify the minute deformations of transmission lines, and the detection efficiency is improved compared with manual inspection.
Emergency rescue
In the ruins of an earthquake, the SONY AS-DT1 can penetrate smoke and debris, providing precise location information of trapped people for search and rescue robots, and reducing the rescue response time to the millisecond level.
Summary
SONY AS-DT1, through the deep integration of the SPAD sensor and dToF technology, demonstrates outstanding performance of 40 meters indoors /20 meters outdoors in long-distance measurements, featuring both high precision and low power consumption. Its lightweight design and industrial-grade reliability make it the preferred solution for long-distance measurement in fields such as unmanned aerial vehicles, robots, and infrastructure inspection, driving the industry towards “centimeter-level accuracy” and “full-scenario coverage”.