Electro-Acoustic Test Bench for Thales DMS
Thales
Context
Thales DMS, a global leader in defence and security systems, required a solution to validate piezoelectric acoustic sensors.
The objective was to measure electrical and acoustic properties with precision, then intelligently group tested sensors into batches for assembly.
Our role
- Designed and implemented a complete electro-acoustic test bench system, combining custom hardware architecture with sophisticated LabVIEW software.
- Managing all studies, technical specifications, comprehensive validation, and on-site deployment.
- Design and fabrication were handled by our specialised partner network, with Spherea Group maintaining full responsibility for integration and performance validation.
Our solution: Electro-Acoustic Test Bench
- Complete Instrumentation Cabinet: Cabinet with integrated safety systems and emergency stop. Seamlessly integrates an audio analyser, RLC meter, preamplifiers, digital output modules and temperature sensor.
- Custom PCB Design: Purpose-built circuit board engineered for automatic signal routing, eliminating manual wiring and ensuring signal integrity across all measurement paths.
- Precision Mechanical Tool: Custom-designed mechanical fixture with precision touch probes, enabling repeatable contact points for consistent electric measurements.
- Acoustic Enclosure: acoustic enclosure incorporating a speaker, designed to isolate environmental noise and maintain stable acoustic field conditions during testing.
Key benefits
This project met all required certifications (CE, CECC, RoHS, and REACH), ensuring full regulatory and client‑specific compliance while delivering several key benefits to Thales, including:
- Enhanced Technical Accuracy
Reliable measurement of electrical properties and acoustic performance through controlled‑environment testing, ensuring precise characterization of components. - Robust System Integration
Seamless orchestration of the audio analyzer, RLC meter, preamplifiers, temperature sensors, and safety systems, resulting in a streamlined and fully automated test workflow. - Scalable High‑Volume Production
Ability to support large‑scale testing while maintaining measurement repeatability, data integrity, and full traceability from each individual test to the final batch. - Intelligent, Data‑Driven Assembly
Automated batch creation based on multi‑variable test criteria, optimizing product grouping, improving efficiency, and reducing manual decision‑making.