https://dntddynamics.com/ Recent content on DNTD Dynamics https://dntddynamics.com/images/og-card.png https://dntddynamics.com/images/og-card.png Hugo -- 0.124.0 en Thu, 21 May 2026 00:00:00 +0000 https://dntddynamics.com/lab-notes/mmwave-phase6-microdoppler-classifier/ Thu, 21 May 2026 00:00:00 +0000 https://dntddynamics.com/lab-notes/mmwave-phase6-microdoppler-classifier/ Phase 6 adds a DBSCAN cluster builder and a rule-based micro-doppler classifier to the pipeline. Novel returns are now labeled PERSON, OBJECT, or UNKNOWN before they reach the zone logic. UNKNOWN passes through as PERSON — the classifier can never make the system less safe than the baseline. https://dntddynamics.com/lab-notes/mmwave-phase5-persistent-background/ Thu, 21 May 2026 00:00:00 +0000 https://dntddynamics.com/lab-notes/mmwave-phase5-persistent-background/ The 15-second background learning phase is necessary — but only once. Phase 5 adds a persistent voxel map saved to disk after the first learn, reloaded on every subsequent boot. Also: a novelty-aware refresh gate that means a stationary person can never be silently absorbed into the background. https://dntddynamics.com/lab-notes/mmwave-phase7-swept-volume-clipper/ Thu, 21 May 2026 00:00:00 +0000 https://dntddynamics.com/lab-notes/mmwave-phase7-swept-volume-clipper/ Phase 7 adds a swept-volume workspace clipper to the pipeline. Detections outside the arm’s reachable envelope are suppressed before they reach zone logic. This is the primary technical differentiator over fixed-mount sensors — and the reason the hardware configuration locked at 3× IWR6843AOP on the forearm link. https://dntddynamics.com/lab-notes/mmwave-full-safety-stack-live/ Sat, 16 May 2026 00:00:00 +0000 https://dntddynamics.com/lab-notes/mmwave-full-safety-stack-live/ The IWR6843AOP is now running a complete ROS 2 safety pipeline on the Jetson — CLEAR/CAUTION/STOP zone detection with ego-motion compensation, voxel background learning, fault handling, and a heartbeat watchdog. One non-obvious bug dominated the session: velocity filtering was silently eating motionless people. https://dntddynamics.com/privacy/ Wed, 06 May 2026 00:00:00 +0000 https://dntddynamics.com/privacy/ Privacy Policy for DNTD Dynamics LLC https://dntddynamics.com/returns/ Wed, 06 May 2026 00:00:00 +0000 https://dntddynamics.com/returns/ Return and refund policy for DNTD Dynamics LLC https://dntddynamics.com/shipping/ Wed, 06 May 2026 00:00:00 +0000 https://dntddynamics.com/shipping/ Shipping policy for DNTD Dynamics LLC https://dntddynamics.com/terms/ Wed, 06 May 2026 00:00:00 +0000 https://dntddynamics.com/terms/ Terms of Service for DNTD Dynamics LLC https://dntddynamics.com/lab-notes/mmwave-tlv-live-wrong-firmware/ Sun, 03 May 2026 00:00:00 +0000 https://dntddynamics.com/lab-notes/mmwave-tlv-live-wrong-firmware/ Two days chasing a sensor that accepted every config command, then emitted 16 bytes of 0xFF. Root cause: ISK firmware on AOP hardware. The fix was one file. https://dntddynamics.com/lab-notes/mmwave-sensorstart-error-chirp-out-of-band/ Wed, 29 Apr 2026 00:00:00 +0000 https://dntddynamics.com/lab-notes/mmwave-sensorstart-error-chirp-out-of-band/ All 12 calibrations passed. Sensor State 1. Then nothing. The chirp engine silently refused to run because the end frequency exceeded the regulatory band by 750 MHz. https://dntddynamics.com/lab-notes/iwr6843aopevm-arrived-bringup-notes/ Tue, 21 Apr 2026 00:00:00 +0000 https://dntddynamics.com/lab-notes/iwr6843aopevm-arrived-bringup-notes/ EVM in hand, USB detection working immediately. mmWave Studio looked like the obvious next step. It was a trap — the AOP standalone board can’t connect. UniFlash is the right tool. https://dntddynamics.com/lab-notes/lumina-something-is-taking-shape/ Wed, 15 Apr 2026 00:00:00 +0000 https://dntddynamics.com/lab-notes/lumina-something-is-taking-shape/ A display project. More when it’s further along. https://dntddynamics.com/lab-notes/mmwave_phase7done_cleaned_context/ Mon, 01 Jan 0001 00:00:00 +0000 https://dntddynamics.com/lab-notes/mmwave_phase7done_cleaned_context/ RadarGuard — mmWave Cobot Safety System Context & Session State Last updated: May 21, 2026 (Phase 7 complete, arm build in progress) Project Identity Product name: RadarGuard Repo name: RadarGuard-mmwave-cobot-safety-system GitHub org: DNTD-Dynamics GitHub URL: github.com/DNTD-Dynamics/RadarGuard-mmwave-cobot-safety-system Repo visibility: PUBLIC as of May 20, 2026 Company: DNTD Dynamics (Snohomish, Washington) Contact: contact@dntddynamics.com Website: dntddynamics.com (GitHub Pages + Cloudflare, repo separate from RadarGuard) License: Business Source License 1.1 (BSL 1.1) Free for non-commercial use (research, education, personal projects) Commercial use requires license from DNTD Dynamics Change date: 4 years from first public release → Apache 2. https://dntddynamics.com/lab-notes/readme_521/ Mon, 01 Jan 0001 00:00:00 +0000 https://dntddynamics.com/lab-notes/readme_521/ RadarGuard — mmWave Cobot Safety System Real-time human presence detection and collision avoidance for robot arms and mobile robots, powered by mmWave radar. Built by DNTD Dynamics · Licensed under BSL 1.1 What is this? RadarGuard is an open-source safety system that uses mmWave radar to detect people in a robot’s workspace and output CLEAR / CAUTION / STOP zone commands in real time. Unlike camera-based safety systems, mmWave radar: https://dntddynamics.com/about/ Mon, 01 Jan 0001 00:00:00 +0000 https://dntddynamics.com/about/ The next discoveries are waiting. Most people aren't looking. https://dntddynamics.com/store/ Mon, 01 Jan 0001 00:00:00 +0000 https://dntddynamics.com/store/ Pre-order the mmWave 360° Sensing Kit from DNTD Dynamics.