cid eae1538036fbf677277ddc6fd9bbd85552e0685cca4562b817c3007642793618 · original · open access · via openalex
Title: KPS-COOL Sentinel: A Non-Contact Airborne Ultrasonic Tracking System for Fugitive HFC Refrigerant Emissions Authors: Zachary August Jacoby Venue: Zenodo (CERN European Organization for Nuclear Research) Year: 2026 Canonical: doi:10.5281/zenodo.23446351 URL: https://doi.org/10.5281/zenodo.23446351 Collector: openalex OA: true ABSTRACT 📋 Project Abstract & Operational Paradigm The Model KPS-COOL Sentinel is a value-engineered, non-contact standalone atmospheric over-watch satellite module designed to eliminate invisible Hydrofluorocarbon (HFC) refrigerant leaks from commercial walk-in coolers, freezers, and cold-storage line infrastructure. Instead of relying on slow, retroactive food-temperature alerts or executing invasive, high-risk splices into pressurized hydraulic lines, the KPS-COOL isolates fugitive greenhouse emissions at the absolute micro-fissure stage. The platform operates on a Non-Contact Airborne Ultrasonic Tracking vector, continuously monitoring the high-frequency acoustic turbulence (38 kHz–42 kHz) generated when pressurized gases vent through hairline structural cracks. Upon detection, the edge-processing engine executes predictive interventions by managing appliance overrides over an isolated, secure sub-GHz wireless RF link. 🛠️ Core Firmware Architecture The embedded software stack architecture enforces a rigid separation of concerns across a dual-core silicon matrix, fully isolating non-deterministic networking layers from hard real-time safety functions: Core 0 (Cortex-M7 @ 480 MHz - Master Domain): Orchestrates local web dashboard interfaces, remote Modbus/TCP logging daemons, and historical compliance data streaming out of Flash Bank 1. Core 1 (Cortex-M4 @ 240 MHz - Sentinel Domain): Runs an un-preemptible, freestanding real-time safety loop out of zero-wait-state private Scratchpad RAM. It handles high-speed 200 kHz ADC Direct Memory Access (DMA) filtering blocks branchlessly to compute acoustic transients. Cross-Core Bus Hardening Invariant: Core lifecycles are decoupled via the hardware HSEM (Hardware Semaphore) peripheral. Telemetry transfers across the shared SRAM4 crossbar memory corridor are cache-coherent, thread-safe, and completely immune to asynchronous data-tearing anomalies. 📡 Sub-GHz Appliance Interlock & Soft-Pause Logic To completely eliminate the need for specialized high-voltage electrical installation labor, the system utilizes a plug-and-play, external wireless interception node: The Heartbeat Invariant: Core 1 streams an encrypted status heartbeat to the inline compressor override module every 1000 milliseconds. If the wireless link experiences interference or dropouts exceeding a strict 2.0-second timeout window, the remote node automatically trips its output circuit to fail safely into a paused compressor state. The Soft-Pause Logic: The remote wireless node interfaces directly with the compressor rack's factory external auxiliary pause terminals, halting compressor cycling at the native control layer without abruptly disconnecting main processor power to prevent hardware damage. 📦 Deposited Asset Inventory This repository archive acts as a complete hardware manufacturing and firmware baseline deposit containing: 📁 core_0_master/: Complete C source tree for the Cortex-M7 communications engine, secured with bounded snprintf network buffers and decoupled pointer loops. 📁 core_1_sentinel/: Complete C source tree for the Cortex-M4 acoustic engine, featuring a pure branchless Q16.16 arithmetic transformation kernel. 📁 remote_interlock_node/: Complete C source tree for the standalone external compressor controller box. 📁 zenodo/: Hardware reference files including physical circuit vector schematics, 40kHz analog front-end active filter layouts, and the full manufacturing Bill of Materials (BOM). 📄 Makefile: Master cross-compilation orchestration file matching standard arm-none-eabi-gcc bare-metal environments. ⚖️ Legal Governance Notice (SOS-RMPL-2026) This work is formalized under the Sovereign Open-Science Royalty & Manufacturing Protection License (SOS-RMPL-2026): Allowed Community Use: Unrestricted, royalty-free usage, modification, deployment, and reproduction is granted to all independent restaurants, local diners, non-profit community kitchens, residential operations, academic climate researchers, and independent micro-entities. Corporate Commercial Ceiling: Any multinational corporation, global hospitality contractor, enterprise network operator, or refrigeration hardware manufacturing contractor with an annual gross global revenue exceeding $2,500,000 USD is prohibited from deploying this platform for monetary gain without securing a separate, paid enterprise variance from the Design Authority.