Introduction to P-alert. Da-Yi Chen

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1 Introduction to P-alert Da-Yi Chen

2 The Instrument

3 P-alert: Features DO: 2 sets DI: 4 sets GND: 1 set LED Display: Date Time Intensity Trigger mode IP Address 10/100MHz Ethernet Port: Streaming & Receiving Data to and from Servers Certified by TAF 10-30V Power Socket RS-232 & 485 COMs User configurable

4 P-alert: Detailed Specifications Sensor:Tri-axial MEMS Accelerometer Dynamic Range: 0.1~1960 gal Accuracy:X Y ±2%,Z ±3% Frequency Response: 0.075~10Hz / 0.075~20Hz Output Resolution: 16bit Algorithm:Pd PGA Displacement STA/LTA Modbus TCP:3 Hosts Simultaneously Switch Set-points:2 Channels (Default,10 gal & 50 gal) Set-point Range: 1~1960gal Power Consumption:3.5W Dimension & Weight:125 * 105 * 30 mm / 450g Operating Temperature:-10~60

5 Triggering Modes PD P-wave Displacement (a axis) PGA Peak Ground Acceleration (CWB standard) Disp Displacement (a axis) STA/LTA Short / Long Time Average

6 Record Modes Sampling Rate 100 sps Trigger Record Total length 120 seconds. Pre-event & Post-event are user adjustable. Manual Record Continuous recording Memory No internal memory built. Record data via Ethernet (TCP/IP) to your PC.

7 EEW 系統現況 Palert Seismic Network New Taipei City (1) (51) TaoYuan(1) HsinChu(27) MiaoLi(24) TaiChung(29) NanTou(39) Keelung (1) Taipei City (4) Ilan (32) Hualien (32) ChiaYi(29) TaiNan(45) Kaohsiung(2 0) Titung (30) Total 347 (398) stations PingTung (29)

On-site Warning Device: i-touch Designed specially for P-alert, i-touch is an earthquake warning device, connecting to P-alert by RS-485 cable whose maximum communication length can reach up to 1200

8 On-site Warning Device: i-touch Designed specially for P-alert, i-touch is an earthquake warning device, connecting to P-alert by RS-485 cable whose maximum communication length can reach up to 1200 meters. Users can operate and configure i-touch by its touch screen. I- touch is able to store 100 seismic records (intensity & time) continuously. As events occur, the built-in audio warning will be activated automatically. It has two different sound phases based on different intensities. The built-in battery, supplying power to P-alert simultaneously, can last for 4 continuous hours without AC power supply. An i-touch can be customized for connecting up to three P-alerts (optional), by means of the principal that if two out of three P-alerts detect real seismic waves, the alert will be released. This is to avoid false alarm which is made by humans or nonseismic activities. With the combination of P-alert and i-touch, users are able to apply this advanced function of P-alert to earthquake early warning for reducing any further follow-up damage.

9 i-touch Real Time Seismic Info.

10 Ideas of Small Region Early Warning Palert TCP/IP PC Internet TCP/IP Palert EEW Server TCP/IP ipad iphone Palert Palert Smart phone

11 P-alert the World P-alert to the World MEXICO INDONESIA SWITZERLAND CHINA

12 Installation and Monitoring

13 Get the Tools P-alert Orientation holder Screw Drivers with Various sizes V V Adapter Ethernet cable P-alert You also need Electric drill, screws in different sizes, extended power and Ethernet cables etc.

14 Pick a Proper Location Solid concrete pillars or walls indoors. Installed it vertically due to P wave detected in a axis. Use the holder to orient P-alert to North.

15 A Proper Location Should be Indoors because P-alert is not waterproofed. As close to the ground as possible. Far away from nonnatural vibration. A pillar is always better than a wall. Easy access to power and Ethernet sockets.

16 Power Up Positive Negative Connect DC12V or DC24V power positive to (B)+Vs negative to GND

17 Connect P-alert to PC You can connect your PC or laptop to P-alert directly via a Ethernet cable. If your PC or laptop cannot act as a modem, you need to use a HUB in between. HUB

18 Data Receiving

19 Signal Processing Configuration

21 Continuous Real-Time Data Streams

22 Waveforms from the Palert Seismic Network

23 High Quality Data Acceleration Velocity Displacement Apply a high pass filter P-wave arrival

24 Thanks for your attention.

25 P-alert System Configuration 330 Stations 2 Main Servers 3 Spare Servers

26 Signal Processing Configuration

28 Continuous Real-Time Data Streams

29 Waveforms from the Palert Seismic Network

30 High Quality Data Acceleration Velocity Displacement Apply a high pass filter P-wave arrival

31 Earthquake Early Warning procedure Earthworm Real-time data packet input WAVE_RING Pick_eew_P Pick_eew_S PICK_RING Earthquake Early Warning Report tcpd

32 Earthworm Modules Earthworm Shared Memory Pick_eew_P Pick P-wave arrival Calculate parameters of Pa, Pv and Pd Pick_eew_S WAVE_RING Storing Real-time seismic waveforms After P-arrival has been picked, pick S-wave arrival PICK_RING tcpd Locating Earthquakes by P-wave and S-wave arrivals. Predicting Earthquakes by using Pa, Pv or Pd. Storing P and S arrivals. Storing parameters of Pa, Pv and Pv.

33 P-wave Method for Earthquake Early Warning Systems Acc. Vel. Disp. P d P-wave arrival 3-second time window

34 System Performance

35 Performance of the System

38 Magnitude: 5.79 Processing Time: s EEW Report 1

39 Magnitude: 5.85 Processing Time: s EEW Report 2

40 Magnitude: 5.82 Processing Time: 16.28s EEW Report 3

41 Thanks for your attention.

Specifications for: OSOP Raspberry Shake 4D

Specifications for: OSOP Raspberry Shake 4D - Your 4D Personal Seismograph & Accelerograph - An IoT home-automation device Born on: February, 2017 http://shop.raspberryshake.org/ sales@raspberryshake.org