Palert Seismic Sensor
Description
An earthquake always breaks out unexpectedly and sometimes brings devastating impacts, such as fires, road/bridge damage, building collapse, etc. That really threatens people’s lives and brings huge property damage.
Therefore, establishing a complete earthquake early warning system becomes important and urgent to prevent any further significant damage to the important facilities.
Palert is an advanced earthquake P wave alarm detector system from Sanlien in Taiwan and represented by Jenlogix in Oceania. It uses embedded Pd technology developed by Prof. Yih-Min Wu from National Taiwan University who has published many articles on this subject. With over 800 sold in Taiwan alone, it has proven successful and is now supported by the Taiwanese Government (Taiwan has the same number of earthquakes as New Zealand). Sanlien have installations in India, China, Mexico and Japan.
It is designed to reduce earthquake damage by providing as much warning as possible at an affordable cost. The Palert only requires 3 seconds once a P-wave is detected to issue an alarm if it calculates that the following shockwave is likely to be of a significant level to cause damage.
Palert offers four kinds of trigger algorithms:
- Pd – algorithm as developed by Prof. Wu
- PGA stands for Peak Ground Acceleration. Palert offers 10 Hz and 20 Hz low pass filters which are user adjustable to filter out high frequency components in signal generated by non-earthquake vibration.
- Real time displacement calculation which is able to deploy displacement trigger algorithm along “a” axis.
- The conventional STA/LTA trig algorithm is also available in Palert.
The open connectivity of Palert offers Modbus RTU/TCP protocol to seamlessly connect with PC, PLC and HMI (Human Machine Interface). Up to 3 hosts can connect simultaneously. So it is very easy to connect with broadcast, disaster prevention system. It also provides active connection to a server which is useful to deploy in an environment with no real IP. The NTP (Network Time Protocol) capability keeps the Palert internal time within 1 second accuracy.
More details at http://www.earthquakeearlywarning.systems/
Application
- 16 bit 80 MHz CPU and triaxial MEMS sensor for real-time digital processing, providing high-precision vibration measurement
- Embedded with Pd, PGA, Displacement and STA/LTA algorithms that are applied for seismic triggering
- Unique P-wave displacement (Pd) technology for onsite early warning
- Providing recording on PGA or vector acceleration.
- Supporting real-time outputs of local intensity levels of MMI (US and most of the world), KMA (Korea), JMA (Japan), GBT (Mainland China), and CWB (Taiwan)
- 7-segment LED screen for real-time earthquake information
- Cost-effective solution for onsite or regional earthquake monitoring and early warning
- Compatible with Modbus protocol for emergency controls
- Time synchronization via network time protocol (NTP)
- 2 digital outputs (DO) feeding into separate devices or systems
Specifications
- Type: Tri-axial MEMS Accelerometer
- Measuring Range: ±2g
- Frequency Response: 0.05~20 Hz, with 10Hz / 20Hz digital filters
- Output Resolution: 16 Bit
- Algorithms: Pd, PGA, Displacement, STA/LTA
- Power Supply: 10-30VDC
- Power Consumption: 3.5W@12VDC
- Modbus RTU: RS232 / RS485
- Modbus TCP: 3 Hosts Simultaneously
- Active Connection: 2 TCP Servers
- Time Synchronization: NTP or PC Utility (software)
- Data Recording: Network or PC Utility (software)
- Data Format: CSV
- Dimension (W x H x D): 125 x 105x 30 mm
- Weight: 450 g
- Working Temperature: -10°C ～ +60°C