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Article

Imaging radar is the next big thing

2022-01-24
The sensor technology is designed to bridge some of the gap between current-generation radar and lidar – while retaining the traditional advantages of RF-based sensors.
Book

LiDAR Technologies and Systems

2019-07-10
The first part of LiDAR Technologies and Systems introduces LiDAR and its history, and then covers the LiDAR range equation and the link budget (how much signal a LiDAR must emit in order to get a certain number of reflected photons back), as well as the rich phenomenology of LiDAR, which results in a diverse array of LiDAR types. ...The first part of LiDAR Technologies and Systems introduces LiDAR and its history, and then covers the LiDAR range equation and the link budget (how much signal a LiDAR must emit in order to get a certain number of reflected photons back), as well as the rich phenomenology of LiDAR, which results in a diverse array of LiDAR types. The middle chapters discuss the components of a LiDAR system, including laser sources and modulators, LiDAR receivers, beam-steering approaches, and LiDAR processing. ...The middle chapters discuss the components of a LiDAR system, including laser sources and modulators, LiDAR receivers, beam-steering approaches, and LiDAR processing.
Training / Education

LIDAR for ADAS and Autonomous Sensing

Light detection and ranging (LIDAR) sensing, a sensing method that detects objects and maps their distances, is seeing rapid growth and adoption in the industry. ...This course will provide the foundation on which to build LIDAR technologies in automotive applications. The seminar will begin with a review of infrared basics: electromagnetic spectrum, spectral irradiance, night vision and eye safety.
Book

Field Guide to Lidar

2015-01-01
Other topics covered include receivers, apertures, atmospheric effects, and appropriate processing of different lidars. Lasers and modulation are presented in terms of their use in lidars. The lidar range equation in its many variations is discussed along with receiver noise issues that determine how much signal must be received to detect an object. ...Field Guide to Lidar covers the various components and types of active electro-optical sensors—referred to as lidars in the text—from simple 2D direct-detection lidars to multiple sub-aperture synthetic aperture lidars. ...Field Guide to Lidar covers the various components and types of active electro-optical sensors—referred to as lidars in the text—from simple 2D direct-detection lidars to multiple sub-aperture synthetic aperture lidars.
Technical Paper

LiDAR Based Sensor Verification

2018-04-03
2018-01-0043
Currently, annotating ground-truth data is a tedious and manual effort, involving finding the important events of interest and using the human eye to determine objects from LiDAR point cloud images. We present a workflow we developed in MATLAB to alleviate some of the pains associated with labeling point cloud data from a LiDAR sensor and the advantages that the workflow provides to the labeler. ...We present a workflow we developed in MATLAB to alleviate some of the pains associated with labeling point cloud data from a LiDAR sensor and the advantages that the workflow provides to the labeler. We discuss the capabilities of a tool we developed to assist users in visualizing, navigating, and annotating objects in point cloud data, tracking these objects through time over multiple frames, and then using the labeled data for developing machine learning based classifiers.
Book

LiDAR Technologies and Systems

2019-07-10
Why are vision systems fundamental and critical to autonomous flight? What are the vision system tasks required for autonomous flight? How can those tasks be approached? It addresses the role of vision systems for autonomous operations and discusses the critical tasks required of a vision system, including taxi, takeoff, en-route navigation, detect and avoid, and landing, as well as formation flight or approach and docking at a terminal or with other vehicles. These tasks are analyzed to develop field of view, resolution, latency, and other sensing requirements and to understand when one sensor can be used for multiple applications. Airspace classifications, landing visibility categories, decision height criteria, and typical runway dimensions are introduced. The book provides an overview of sensors and phenomenology from visible through infrared, extending into the radar bands and including both passive and active systems.
Technical Paper

Dynamically Adjustable LiDAR with SPAD Array and Scanner

2021-04-06
2021-01-0091
Typical devices for detecting those objects include cameras, millimeter-wave RADAR, and light detection and ranging (LiDAR). LiDAR uses the flight time of a short-wavelength electromagnetic wave. Because of that LiDAR is expected to find even small objects such as tire fragments on a road in high resolution. ...For example, while a vehicle is travelling at high speeds, LiDAR needs to detect apparently small objects at long distances, and while it is travelling at low speeds, LiDAR has to detect objects over a wide angular range. Conventional LiDAR is developed to satisfy all requirements, providing performance including detection distance, resolution, and angle of view tends to expose issues such as cost and size when it is mounted onboard. ...Because of that LiDAR is expected to find even small objects such as tire fragments on a road in high resolution. The detection performance required for LiDAR depends on the operational design domain (ODD).
Training / Education

LIDAR and Infrared Cameras for ADAS and Autonomous Sensing

This two-day seminar examines ADAS and autonomous vehicle technologies that have disrupted the traditional automotive industry with their challenges and potential to increase safety while attempting to optimize the cost of car ownership. LIDAR and Infrared camera sensing are seeing a rapid growth and adoption in the industry. However, the sensor requirements and system architecture options continue to evolve almost every six months.
Technical Paper

LiDAR Pose Estimation for Vehicle Safety Systems

2010-04-12
2010-01-0464
This paper presents a proof of concept for an algorithm to determine the attitude of a multi-layer laser rangefinder or LiDAR (Light Detection And Ranging) relative to a reference frame given the ability of the LiDAR to make measurements to a planar surface with sufficient and proper excitation.
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