Gain Critical Seconds to Evacuate: Deploying an Earthquake Early Warning System
Earthquakes cannot be predicted, but they can be detected early. P-wave detection gets ahead of the S-wave, giving high-tech fabs and laboratories critical time for emergency equipment shutdown, elevator stops at the nearest floor, and personnel evacuation.
1. Principle: Why Can Earthquakes Be Detected Seconds to Tens of Seconds in Advance?
Seismic waves propagate through the Earth's crust mainly as two types of waves: 1. P-wave (Primary Wave, longitudinal wave): Travels very fast (approx. 5~7 km per second) with small amplitude, and usually does not cause structural damage. 2. S-wave (Secondary Wave, transverse wave): Travels more slowly (approx. 3~4 km per second) with violent vertical and horizontal shaking; it is the actual cause of building collapse and damage to precision production lines.
2. Critical Interlock Responses for High-Tech Fabs and Critical Infrastructure
| Facility System | Automatic Interlock Protection | Losses Prevented |
| Semiconductor Wafer Fabrication Tools | Emergency homing of transfer robot arms; immediate shutoff of exposure tool laser sources | Prevents wafer breakage and stage scratching, and misalignment of high-value precision optics |
| Toxic Chemical and Specialty Gas Lines | Instant closure of pneumatic emergency shutoff valves (ESV); automatic nitrogen purge | Prevents leakage and explosion of pyrophoric or highly toxic gases such as silane (SiH4) |
| High-Tech Cleanroom Elevators | Cancels the current destination and stops level at the nearest floor with doors open | Prevents technicians from being trapped in the elevator shaft after a power trip |
Genuine authorized stock supplied by ICANSTron, with a one-year manufacturer warranty.