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Broadband Seismometer (Trillium-120P)
 

 
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Trillium 120P

실시간 지진파 원격 측정 시스템, 쯔나미 경고 시스템 구성

극한지에서도 신뢰성있는 지진파 탐지

 

The Trillium 120P is a compact portable sensor offering superior broadband performance over a wide temperature range. Instrument self noise is within 4 dB of the NLNM (New Low Noise Model) at 100 seconds and below the NLNM up to 10Hz.  The very low self-noise of the Trillium 120P makes it ideal for local, regional and teleseismic studies in both observatory and portable applications. Portable network users will appreciate the low power consumption and reliable operation over a temperature range of ±45ºC without re-centering

This instrument incorporates the same symmetric tri-axial design and suspension system as the highly successful Trillium 40. The design employs fewer parts than traditional sensors and offers improved temperature stability. The robustness and reliability of the mechanical suspension is well proven. With more than 500 Trillium 40 units operating in the field, there have been no mechanical failures.

As with all Trillium sensors, the 120P does not have a mass lock, instead using a field proven suspension system capable of withstanding the rigors of field handling and transportation. During deployment the sensor requires only manual leveling before operation.
 

 

Nanometrics

1. 인공위성시스템을 세계 최초로 지진연구에 도입

2. 지진과 환경 분야에서의 디지털 및 네트워크 기술에 세계적인 선도 기업

3. 광대역 전송 지진계 ( Broadband seismometer )

4. 지진파의 실시간 원격측정 네트워크(Rreal-time seismic telemetry network )

5. 자체 노이즈 보정 ( Self noise performance )

6. 카나다의 북극해와 같은 극한( 極寒, 매우추운) 상황에서도 장기간 안정적으로 사용가능

7. 휴대와 고정형 양쪽으로 모두 사용가능

( Portable and permanent observatory )

8. 쯔나미 지진해일 경고 시스템 (Tsunami Warning System )

9. 해저 지진 탐사 ( Survey of the submarine mountain range )

10. 인공위성과 인터넷 ( internet and satellite )을 통한 통신

(지진연구용 인공위성 시스템 )

11. 지역과 전 세계의 데이터를 수집하고 교환할 수 있는 common platform을 제공

 

References

New Low-Noise Model (NLNM) from Peterson (1993)

Observation and Modeling of Seismic Background Noise

PDF Mode Low-Noise Model (MLNM) from McNamara and Buland (2004)

Ambient Noise Levels in the Continental United States

Event Magnitudes from Clinton and Heaton (2002)

Potential Advantages of a Strong Motion Velocity Meter Over a Strong Motion Accelerometer

 

 

Trillium 120P Technical

 

Specifications

 TECHNOLOGY                                                               
 Topology  Symmetric triaxial
 Feedback  Force balance with capacitive transducer
 Mass centering
Operates over full temperature range without manual re-centering;
Manual centering control included 
 Leveling Integrated bubble level; Adjustable locking leveling feet 
 Alignment
Vertical scribe marks for N/S; Precision N/S guide in top of cover for straight-edge,
line or laser level; Precision holes for 5/16" alignment rod for E/W  
   
 PERFORMANCE  
 Self noise  4 dB above the NLNM at 100 seconds and below the NLNM up to 10 Hz
 Sensitivity 1201 V*s/m ±0.5%
 Bandwidth -3 dB points at 120s and 175 Hz 
 Transfer function
Lower corner poles within ±0.5% of nominal provided; High frequency poles
and zeros within ±5% of nominal provided 
 Clip level > 15 mm/s up to 1.5 Hz 
 Temperature ±45°C without re-centering
   
 INTERFACE  
 Connector 19-pin MIL-C-26482, mounted in base 
 Velocity output 40 V peak-to-peak differential; Selectable XYZ or UVW mode 
 Mass position Three independent voltage outputs 
 Calibration input
Single voltage input with one active high control signal per channel; Calibration
in XYZ or UVW, selectable via control lines
 Serial port For retrieval of sensor response information and instrument control 
   
 POWER  
 Supply voltage 9 to 36 volts DC isolated input 
 Power consumption 650 mW typical at 15 V input 
 Protection
Reverse-voltage protection; Auto-resettable over-current protection
(No fuse to replace)
   
 PHYSICAL  
 Diameter 21.0 cm 
 Height 20.9 cm to 21.8 cm depending on leveling feet extension 
 Weight 7.2 Kg 
 Handling Detachable lifting handle included 
   
 ENVIRONMENTAL  
 Operating temp. -20°C to +50°C
 Humidity 0 to 100% 
 Shock
20g half sine, 5 ms without damage, 6 axes;
No mass lock required for transport 
 Packaging Rated to IP68 and NEMA6P for outdoor use