Seismosignal 410 Better Crackrar ✦ Trusted & Ultimate

| Feature | Specification | Rationale | |---------|---------------|-----------| | Sampling Rate | 2 MS/s (minimum) per channel | Satisfies Nyquist for 500 kHz AE. | | Resolution | 24‑bit ADC, oversampling to 32‑bit effective. | Improves dynamic range for weak AE bursts. | | Synchronisation | IEEE‑1588 PTP or GPS‑disciplined clock, < 1 µs jitter. | Critical for array TDOA calculations. | | Channel Count | ≥ 4 simultaneous channels. | Provides redundancy and spatial filtering. |

| Module | Algorithm | Expected Impact | |--------|-----------|-----------------| | Wavelet‑Based Event Detection (WBED) | Continuous wavelet transform (CWT) with adaptive threshold derived from local noise statistics. | Detects transient AE with high sensitivity; reduces FP. | | Real‑Time Spectral Kurtosis (SK) | Calculates kurtosis over moving windows to highlight impulsive events. | Flags non‑Gaussian bursts typical of cracks. | | Beamforming & TDOA | Delay‑and‑sum across sensor array; estimate source location. | Distinguishes local cracks from remote disturbances. | | Machine‑Learning Classifier | Lightweight CNN/LSTM trained on labelled AE vs. noise data. | Further reduces FP while maintaining TP. | | Data Compression | Lossless predictive coding + event‑driven storage. | Cuts storage/transfer load by > 80 % without losing diagnostic detail. | seismosignal 410 better crackrar

| Phase | Duration | Milestones | |-------|----------|------------| | 1. Feasibility & Procurement | 0‑2 mo | Select piezo‑AE sensors, PGA, high‑speed ADC board; finalize design. | | 2. Prototype Development | 2‑5 mo | Assemble hardware, integrate firmware (WBED, TDOA). | | 3. Laboratory Validation | 5‑7 mo | Run PLB tests; tune thresholds; train ML classifier. | | 4. Field Pilot (1 site) | 7‑9 mo | Install on a test bridge; collect 4 weeks of data; refine algorithms. | | 5. Production‑Ready Design | 9‑11 mo | Harden enclosures, finalize PCB layout, certify for IP‑66. | | 6. Documentation & Handover | 11‑12 mo | Deliver user manual, calibration procedures, and software SDK. | | | Synchronisation | IEEE‑1588 PTP or GPS‑disciplined

Risk mitigation – Parallel development tracks for hardware and firmware to avoid schedule slippage; early integration of a modular software framework (C++/Python API) to allow future algorithm upgrades. | Provides redundancy and spatial filtering