A layered diagnostic for stale LiDAR obstacles in Nav2, connecting fresh observations and clearing-ray geometry to a reproducible place-and-remove test.
Category: Robotics LiDAR
LiDAR–IMU Initialization: How to Check Whether Your Calibration Motion Is Sufficient
A capture-sufficiency worksheet for LiDAR–IMU initialization, with method-specific excitation feedback and independent validation of a frozen calibration result.
FAST-LIO Timestamp Units: Diagnose Motion Smear Before Recalibrating
A practical field-contract worksheet and repeat-test procedure for diagnosing FAST-LIO motion smear caused by incorrect point-time interpretation.
Recording LiDAR and IMU Bags Without Losing Per-Point Timing
A field-contract and replay checklist for preserving per-point timing when recording LiDAR and IMU messages.
Flickering LiDAR Clouds: Separate Scan Batching From Missing Measurements
A fixed-scene procedure that separates point-cloud display persistence, scan batching and missing measurements.
LiDAR Publish Rate Falls Below Its Setting: Measure Sensor, Driver and Consumer Separately
A controlled measurement worksheet for LiDAR packet arrival, cloud publication, subscriber reception and completed processing.
ROS 2 LiDAR QoS Mismatch: A Topic Exists but the Subscriber Is Silent
Inspect endpoint policies and test compatible reception before treating a silent ROS 2 LiDAR subscriber as a sensor failure.
Two Ethernet LiDARs on Separate Network Ports: A Host Configuration Checklist
An address, routing and sensor-identity checklist for two Ethernet LiDARs connected to independent host interfaces.
Why a LiDAR Viewer Works but the ROS Driver Receives No Data
A practical diagnostic path for LiDAR data that appears in a viewer but does not reach the ROS driver.
LiDAR in Robotics for Hospital Supply Carts: Crowded Corridors, Glass Doors and Elevators
lidar in robotics practical guide with field checks, setup decisions and LidarStar sensor-selection notes.
