Surface Ground Seismic Instrument Three Component Digital Strong Motion Accelerograph Triaxial Accelerometers 3 Channels Acceleration Seismometer

Product Description

Surface Ground Seismic Instrument Three Component Digital Strong Motion Accelerograph Triaxial Accelerometers 3 Channels Acceleration Seismometer


GDL-PA4 is an integrative seismic observation instrument which integrates functions of acceleration Induction, acquisition, save, data transmission and detection. A 24-bit acquisition device, a force-balance accelerometer, a data save unit, a network communication unit, and a GPS time-service timing unit are built in GDL-PA4. 

The force-balance accelerometer is applicable to induce the tri-axial vibration acceleration signals. switch the vibration signals into voltage signals according to proportion, and then transmit the signals to realize vibration measurement; the force-balance accelerometer includes three acceleration sensors in north-south, east-west and vertical directions. and the three sensors are mutually independent and orthogonal. 



The acquisition device is applicable to collect the voltage signals transmitted from the sensors, including three fully- balanced difference channels with high resolution, high dynamic range and fast real-time data stream transmission; the acquisition device has high precision of timing and punctuality; meanwhile, real-time data of multiple sampling rates can be obtained through network; when sampling on the point 50, the dynamic range can achieve 138dB. 

An industrial-grade CF card memorizer with large capacity and wide temperature range is built in the acquisition device, so that it can record continuous data, event data and calibration data for a long time, wherein in order to describe the macro seismic calibration details, the macroseismic calibration data can be recorded by the acquisition device at 500-point sampling rate. The data of multiple sampling rates can be simultaneously transmitted to the network center in real time through Internet. In addition, the three-component digital strong vibration accelerometer is highly integrated, so that it has characteristics of small volume, light weight and low power consumption.



Application

1. Free site strong earthquake observation;

2. Strong vibration view of important buildings, structures and major facilities such as hydropower stations, DAMS and nuclear power plants
Measurement and health monitoring;

3. Artificial blasting observation;

4. Vibration monitoring of DAMS, Bridges, stations, tunnels and other facilities;

5. Site seismic safety assessment, etc.;

6. Emergency flow seismic observation, earthquake scientific investigation, earthquake early warning and monitoring, landslide and rock fall monitoring;

7. Build an earthquake intensity quick report and earthquake early warning network;

8. Cultural relic preventive protection and cultural relic facility environmental monitoring system.

Sensor

Structure: three points to one, force balance electronic feedback;

Range: + 4G;

Low bandwidth: DC - 280 hz (3 db);

Dynamic range: greater than 150dB;

Nonlinear: better than 0.1%;

Horizontal sensitivity: better than 1%;

Low output:

Soil 9.3467V (double-ended);

Temperature drift: < 500 ug/C;

Setting zero: manual;

Damping calibration: there;

collector

Low ADC: 24;

Dynamic range: greater than 135dB@100sps;

Sampling rate: 50SPS, 100SPS, 200SPS, 500SPS;

Digital filter: linear phase FIR/ minimum phase FIR;

Distortion: better than -100dB;

DAC: 16 bits, maximum output current soil 5mA;

Calibration signal type: pulse, sine wave optional, support strong damping Properly;

Start mode: timing, command;