Underground Seismic Instruments Refraction Exploration Seismograph
Refraction Exploration Seismograph for Underground Seismic Survey
The seismograph can be used for reflection, refraction, surface wave exploration, pulsation measurement, seismic mapping, pile foundation detection, vibration measurement and wave velocity measurement, and obtain strata section and other data through data processing means.
Scope of application:
1. Foundation engineering
Foundation and subgrade cavity survey; Cavern exploration
Divide bedrock and overburden
Strata division and geological survey of disease
Research on buried depth, morphology and distribution of bedrock
2. Water conservancy and electric power exploration
Dam hidden danger detection
Preliminary geological foundation survey of hydraulic engineering
Measurement of sediment in river course and reservoir and inspection of drainage effect
Hydropower station engineering survey
Regular inspection of water conservancy and electric power projects
3. Bridge engineering inspection
Bridge foundation inspection
Pier and building pile foundation inspection
High-rise building and bridge vibration monitoring
Specification
| Channel | 6/12/24/48 |
| Sample stations |
1024, 2048, 4096, 8192, 16384 Micro-seismic survey, 1M sampling, several notches |
| Sampling frequency |
10μs, 25μs, 50μs, 100μs, 200μs, 500μs, 1ms, 2ms, 5ms, 10ms, 20ms |
| Micro-seismic survey | 1ms~200ms, selectable A/D converter: 24-bit |
| Signal stack and amplification | 32 bit |
| Dynamic range | 144dB |
| Frequency pass bands | 0.1Hz~4000Hz |
| Noise | 1μV(full-frequency) |
| Amplitude consistency | ±0.2% |
| Phase consistency | ±0.01ms |
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