VIBSIST-250

Skip to content

You are here: HOME > SEISMIC EQUIPMENT > SEISMIC SOURCES > VIBSIST 250

VIBSIST-250

BENEFITS

-Effective reflection and refraction seismic source

-Produces compression and shear waves

-High productivity

-High resolution

-Rugged and mobile

ADDITIONAL BENEFITS

-Environmentally friendly

-Mechanically reliable

-Compatible with most seismographs

The VIBSIST is a multi-impact, time-distributed source that uses a dedicated vehicle and hydraulic rock breaker, powered through a computer controlled flow regulator. The vehicle is powered by a Diesel 15/25 Hp motor with electric starter engine, moves at 2 or 4 km/h and can climb slopes of max 300. Temperature range for operation is, normally –20° to 65°C. Lower temperature is optional.

APPLICATIONS

- Multi-offset, multi-azimuth VSP
- 2D & 3D surface reflection and refraction
1. Mineral exploration
2. Hydrogeological studies
3. Hazardous waste investigations
4. Shallow oil and gas
5. Research and education

The seismic signals are produced as a series of pulses, according to a specific preprogrammed sequence.

The use of a monotonous variation of the impact rate controls effectively the nonrepeatability of the impact intervals and achieves a wide bandwidth even when coupling to the ground is relatively poor.

Using standard equipment allows the VIBSIST-250 to be a safe, non-destructive and environmentally friendly highresolution seismic source. It also makes it reliable and highly cost effective.

SYSTEM COMPONENTS

SYSTEM MODULES

1. The controller transfers to the impact hammer the sweep control sequence provided by the computer
2. Caterpillar vehicle with combustion engine operating in accordance with the sweep control sequence, through a hydraulic servo controller
3. The ground impact assembly includes a pressure plate (may be customized for certain ground conditions).
4. A variety of seismographs can be used, they include all DMT Summit series and Geometrics’ Geode, StrataVisor and StrataView.
5. With non-Windows seismographs, a laptop is required but not provided with the VIBSIST-250.

SOFTWARE

Four software modules are included as part of the VIBSIST-50 system, they are:
- Controller, used to program the sweep control sequence
- Sweep Decoder, correlates the sweeps. This module can either be used for fast On-Line monitoring or elaborate Off Line processing
- Signal Conditioning, includes a collection of filtering programs used for processing of the records before or after correlation
- Signal Display Interface, allows the operator to visualize the data conveniently and flexibly

SPECIFICATIONS

Impact energy: 120—240 J / impact (optional 300—500 J / impact)
Impact frequency band: approximately 20 to 1000 Hz
Repetition rate: programmable between 3 to 20 impacts per second
Programmed sweep characteristics: operator designed (graphic interface) or preset
Sweep time adjustment: 2.5s to desired (this is restricted by the number of samples available per recording channel in the acquisition system).
Controller
    Electric remote control (joystick) for normal operations, Manual for emergency
Data transmission
    Radio / Cable link for trigger, pilot signal, audio and remote control
Impact Hammer
    Hydraulic with gas accumulator
    Vertical or Horizontal direction (may impact on surface or a wall)
Impact Plate
    Steel or aluminum
    F 400mm or oval 400 to 800mm
Hydraulic Controller
    Oil Tank: 20 l
    Pressure: 150 bar
    Max flow: 55 l / min
Total weight: 1000—1500kg
Dimensions: 1400x800x1500 mm (LxWxH)