AOM Systems SpraySpy LabLine & ProcessLine Online Spray Monitoring System
| Brand | AOM Systems |
|---|---|
| Origin | Germany |
| Model | SpraySpy LabLine / SpraySpy ProcessLine |
| Measurement Principle | Laser-based Time-of-Flight Droplet Sizing & Velocimetry |
| Output Parameters | Droplet Diameter (µm), Velocity (m/s), Number Density (1/cm³), Transparency Classification, Volumetric Flow Density (mL/min·cm²), Momentum (kg·m/s) |
| Environmental Rating | ATEX Zone 1/21 Certified |
| Data Compliance | FDA 21 CFR Part 11 Ready (Audit Trail & Electronic Signature Optional) |
| Software Platform | SprayAI v4.2 (Real-time AI Analytics Engine) |
| Integration Interface | EtherCAT, PROFINET, OPC UA, RESTful API |
Overview
The AOM Systems SpraySpy LabLine and ProcessLine represent a class-leading optical sensing platform engineered for real-time, non-intrusive characterization of atomized sprays in industrial and R&D environments. Built upon a patented laser diffraction and time-resolved Mie scattering architecture, SpraySpy employs dual-beam laser illumination and high-speed photodetector arrays to resolve individual droplet transit events with microsecond temporal resolution. Each detected scattering pulse is timestamped and analyzed to extract droplet diameter (via Mie scattering intensity ratio), axial velocity (via time-of-flight between two parallel laser sheets), and optical opacity classification (based on signal attenuation profile). This physics-based measurement approach—distinct from statistical ensemble methods such as PDA or LDV—enables deterministic, particle-by-particle metrology without assumptions about droplet distribution shape or refractive index homogeneity. The system operates across a broad dynamic range: droplets from 5 µm to 500 µm in diameter, velocities from 0.5 m/s to 120 m/s, and spray densities up to 10⁴ droplets/cm³ per measurement volume. Its core function is not merely data acquisition, but closed-loop process intelligence: transforming raw scattering signatures into actionable quality metrics aligned with ISO 8502-3 (coating application consistency), ASTM D7963 (spray pattern uniformity), and automotive OEM paint shop specifications (e.g., VW TL-52222, Ford WSS-M2P147-A).
Key Features
- Simultaneous single-droplet sizing and velocimetry with <1% repeatability (per ISO 13320 Annex B)
- SprayAI v4.2 real-time analytics engine: detects >60% of common spray faults—including fan-width collapse, nozzle clogging, pressure drop, and electrostatic charge decay—within ≤200 ms latency
- ATEX-certified sensor heads (II 2G Ex db IIB T4 Gb / II 2D Ex tb IIIC T135°C Db) enabling deployment in Class I Div 1 and Zone 21 hazardous areas
- No calibration drift: reference-free operation using geometric beam spacing and fixed detector geometry; traceable to NIST-traceable laser wavelength standards
- Modular hardware architecture: LabLine configured for benchtop R&D (adjustable measurement volume, 1–5 kHz sampling); ProcessLine hardened for 24/7 production integration (IP65 enclosure, -10°C to +50°C ambient)
- Multi-modal droplet classification: distinguishes transparent (e.g., solvent carriers) and opaque (e.g., pigment-loaded) droplets via differential extinction analysis—critical for effect pigment distribution validation
Sample Compatibility & Compliance
SpraySpy is validated for use with aqueous, solvent-borne, UV-curable, and high-viscosity (up to 500 mPa·s) coatings—including basecoats, clearcoats, primers, adhesives, and functional dispersions. It supports all major atomization technologies: rotary bell applicators (Ransburg, Dürr), air-assisted and airless pneumatic nozzles, ultrasonic雾化 (Sonotrode-based), and electrostatic spray systems. Regulatory alignment includes full support for GLP/GMP-compliant workflows: electronic audit trails, user access control (role-based permissions), data integrity logging (ALCOA+ principles), and optional 21 CFR Part 11 compliance package with digital signature and biometric authentication modules. All firmware and software updates undergo IEC 62304 Class B medical device-grade verification—ensuring deterministic behavior in safety-critical control loops.
Software & Data Management
SprayAI operates as a deterministic real-time analytics kernel—not a post-processing dashboard. Raw photodetector waveforms are processed onboard FPGA for sub-millisecond feature extraction, then streamed via GigE Vision to the host PC where SprayAI applies adaptive clustering algorithms to identify anomalous droplet populations (e.g., bimodal size distributions indicating partial nozzle blockage). Data persistence options include local SQLite databases (with automatic encryption), network-attached storage (NAS) via SMB/CIFS, or secure cloud ingestion (AWS IoT Core or Azure IoT Hub). Historical datasets support advanced analytics: PCA-driven fault root-cause mapping, Weibull-based predictive maintenance scheduling for spray guns, and regression modeling of film thickness vs. momentum flux (ρ·v·d³). Export formats comply with ASTM E2500-13: CSV (ISO 8601 timestamps), HDF5 (for ML training), and PDF reports embedding traceable metadata (sensor ID, calibration certificate expiry, environmental conditions).
Applications
- Automotive OEM paint shops: real-time validation of metallic flake orientation consistency and orange peel precursor detection
- Aerospace coating lines: monitoring thermal barrier spray uniformity for turbine blade refurbishment (per AMS 2420)
- Pharmaceutical inhaler development: quantifying actuator-triggered droplet velocity decay profiles under varying humidity
- Food-grade coating systems: verifying edible film thickness distribution on confectionery substrates without contact
- R&D labs evaluating novel nanomaterial dispersions: correlating primary particle aggregation state with droplet breakup efficiency
FAQ
How does SpraySpy differ from traditional Phase Doppler Anemometry (PDA) systems?
SpraySpy uses time-of-flight Mie scattering with fixed geometry—eliminating PDA’s reliance on fringe spacing calibration and sensitivity to refractive index assumptions. It delivers absolute size/velocity without iterative inversion.
Can SpraySpy operate in high-humidity or solvent-saturated atmospheres?
Yes. Sensor housings feature purge-compatible flanges and heated optics (optional) to prevent condensation; certified for continuous operation at 95% RH and VOC concentrations up to 1000 ppm.
Is third-party validation data available for ISO/IEC 17025 accredited labs?
AOM Systems provides a full metrological validation report (including uncertainty budget per GUM) and supports on-site witness testing by customer-appointed auditors.
What is the minimum detectable droplet concentration for statistically robust analysis?
For 95% confidence in Dv50 estimation, ≥500 droplets per second within the measurement volume is recommended—achievable down to 0.1 mL/min volumetric flow with optimized nozzle standoff.
Does SpraySpy require periodic recalibration?
No. The system is geometrically self-referencing; only annual verification against NIST-traceable dimensional standards is advised per ISO/IEC 17025 Clause 6.5.3.
