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GL-PCS60/120
Broadband Seismograph
Main application fields:
Nationa seismic stations,stations and regional seismic networks are used in natural seismic observation, reservoir induced earthquak monitoring, min seismic monitoring, broadband seismic observation and underground structure imaging for oil and gas exploration, which can be used fo long-term fixe observatio and Mobile seismic observation and other scientific investigations.
OVERVIEW
Description
The GL-PCS60/120 is an integrated seismic observation instrument combining a wideband seismometer with multiple functions including data acquisition, storage, transmission, and recording triggering. It features a 32-bit 3-channel data acquisition unit, compact wideband seismometer, data storage module, network communication capabilities, and GNSS timing unit. The wideband seismometer detects triaxial vibration velocity signals and converts them into proportional voltage outputs for vibration measurement. Its three
identical sensors are arranged at 54.7-degree angles relative to the vertical axis, forming a 120° circumferential distribution that converts signals into vertical, east-west, and north-south orientations through coordinate transformation. The acquisition unit processes voltage signals from these sensors via three high-resolution, wide-dynamic-range differential channels that deliver real-time data streams with ultra-precise timing. Equipped with a large-capacity 8GB industrial-grade CF card memory and wide temperature tolerance, it enables long-term recording of continuous data, event data, and calibration data. Multiple sampling rates can be transmitted in real-time via network to the seismic network center. Supporting multiple connections and FTP data downloads, the GLPCS60/120 compact wideband seismometer achieves miniaturization, lightweight design, and low power consumption through advanced integration.
Amplitude frequency and phase frequency characteristic curves of internal sensors in GL-PCS60
GL-PCS60 built-in sensor noise curve
A magnitude 7.4 earthquake struck the Komandorsky Islands on December 21 at 01:01, as officially measured by China’
s seismic network. The quake occurred in the Komandorsky Islands region (north latitude54.95°N, east longitude164.79°E)
with a focal depth of 20 kilometers. (Testing location: Sanmenxia)
Technical Parameter
Sensor
●Structure: three-directional integration, capacitive
transduction, 54.7°UVW structure;
● Sensitivity difference: 1000 (Vs/m);
●Bandwidth: 0.0167 Hz~80Hz, 0.0083Hz~80Hz
●Dynamic range: greater than 155 dB (1~10Hz);
● Nonlinearity: better than 0.1%;
●Horizontal sensitivity: better than 1%;
●Output: ±10V (both ends);
●Input limit speed (1Hz):>10mm/s;
●Zero adjustment: automatic, remote;
●Parasitism resonance:>100Hz;
●Openandlockswing:zeroadjustment,automatic
openswingwhenpowerison,automaticlockswing
whenpowerisoff;
●Self-noise: 0.025Hz~10Hz, lower than
NLNM; collector
●Dynamic range: greater than 135dB@100sps
● Sampling rate: 50sps, 100sps, 200sps, 500sps
(multiple sampling rates output at the same time)
●Digital filter: linear phase FIR/minimal phase FIR
● Distortion: better than-100dB
● DAC: 16 bits, maximum output current ±5mA
●Analog signal types: pulse, sine wave, pseudorandom code;
●Start mode: timing, instruction;
●Interface: LAN Ethernet;
● Data communication protocol: low delay realtime data network service Jopens, TCP/IP, FTP;
Overall machine performance
●Timing: GNSS timing unit/IRIG code input;
●Time synchronization error: less than 0.01ms;
●Clock stability: better than 0.5ppm;
●Event trigger: STA/LTA, level, timing;
●Conversion factor: 74.5 nV/count;
●Powersupply:+12(9V–20V),
average power consumption less than 2W
●Storage environment: -40℃ –80℃;
●Working environment: temperature: -40℃ -60℃;
●Humidity: 0–100%;
●Data format: EVT, mini SEED, GEOPEN;
●Size: Φ150×205mm;
●Weight: 5.5 kg.
●Case protection: IP67
