Development and Proof-of-Concept Evaluation of a Compact Autonomous Multi-Parameter Instrumentation Platform for Confined Dynamic Systems

A compact autonomous recorder was developed for short-duration measurements in confined moving systems where event-time cabling is unavailable. The cylindrical platform combines pressure, high-range acceleration, and angular-velocity interfaces with channel-specific conditioning, FPGA/microcontroller control, SDRAM buffering, eMMC storage, internal power, and mechanical support. Its operating sequence covers baseline checks, circular buffering, threshold-initiated event capture, nonvolatile storage, and post-test retrieval. An eight-field map and count-to-unit equations describe the readout convention. Three-channel electrical checks captured 1 kHz inputs and gave voltage spans of 6–8 mV at a nominal 5 V input. The loading evaluation comprised one acceleration–angular-velocity event and one pressure–acceleration event. Both tests stored eight-field event records over 8 ms at a nominal sampling rate of 1 MS/s per recorded field. Using the count-to-unit conversions, axial acceleration exceeded 24,000 g in the first event and reached approximately 27,000 g in the second, which also recorded approximately 354 MPa pressure. Both records were retrieved after recovery, with post-event communication available. These results demonstrate autonomous recording and recovery for two paired sensing configurations within the same compact architecture. Full simultaneous pressure–acceleration–angular-velocity operation remains to be evaluated.