Welcome To Seismic Source Company

Seismic Source Company is a manufacturer of seismic instruments and data acquisition systems. Its products are used in a broad range of applications: Seismology, Structural Monitoring, Seismic Site Evaluation, Civil Engineering, Gas and Oil Exploration, Industrial Vibration Monitoring.

Products

distributed daqlink4
Networked Seismic Recording System

Inexpensive, Flexible, and Expandable

The Distributed DAQlink 4 System is the combination of a standard DAQlink 4 seismograph and internal, high-speed, network extenders. Using inexpensive twisted pair telephone cable, these network extenders will send triggering times and receive seismic data from other DAQlinks. These cable links can send reach 10,000 ft, or three kilometers in length.

The entire system is connected to a computer which controls the seismograph network and stores the acquired seismic data. This computer can be simultaneously providing Quality Control as the project is acquired. The final data files can be stored in SEG‑2, SEG‑D, SEG-Y, ASCII or MiniSEED format.

 

System Features:


 

Cutting-Edge Performance

1 to 24 channels per seismograph node

High-Speed 24bit ADC – up to 64,000 sps

Wide Bandwidth – DC to 20 KHz

Low Distortion – 0.00008% THD @ 500 sps

Wide Dynamic Range – >124 dB @ 500 sps

Low Noise – less 0.2 µV RMS @ 500 sps

 

Multiple Time Synchronization Modes

GPS Clock Discipline for Autonomous Recording

VHF/UHF Radio for Underground Use

Or synchronize multiple DAQlink via cable

 

Multiple Trigger Modes

Trigger on hammer switch for shot acquisition

Trigger using GPS time for noise monitoring

Trigger using LTA and STA for event monitoring

Two trigger circuits available, one for standard and a second for low-voltage inputs

 

Multiple Data Storage Methods

16 Gbytes internal memory card standard
External mounted, USB-compatible Memory Plug for data backup and transfer
Ethernet connection for fast data transfers and remote data storage
 

Built-in Ethernet Network

Use network to configure seismograph and monitor acquisition
Compatible with cables, Wi-Fi and Cellular Data
Internal FTP server for external data access
 

Built-in Acceptance Testing

Instrument Tests:
  Distortion, Cross-feed, CMRR, Impulse & Noise
Sensor Tests:
  Resistance, Frequency, Damping, Sensitivity

 

Distributed DAQlink4

daq4 24d

 

24 Channel Seismograph

 

 

Operation Modes:


 

Operate as Stand-Alone Seismograph

Use a sledgehammer and hammer switch

Small, lightweight unit for small, fast crews

 

Operate as an Acquisition System

Use a vibrator and Force 3 controller

Network a computer to Monitor Acquisition,
Quality Control Data, and Store Shot Records

 

Passive Monitoring

True Continuous Recording

Use Cellular Modem for Remote Data Collection

Works with surface or downhole sensors

 

Automated Event Detection

Continuously record and store data
Use LTA (Long Term Average) or STA (Short Term Average) to detect events
 

 

distributed daqlink4

The entire system controlled from a central location


distributed daqlink4

24 Channels per Node

 

Distributed DAQlink 4 with Built-In Network Extender Features:


High-speed time break, system status and data transfer

Uses inexpensive twisted pair telephone cable

Simple setup and configuration

Allows seismograph spacing of 10,000 ft, 1.9 miles or 3 kilometers

 

distributed daqlink4

Standard DAQlink 4 Seismograph
with standard top-mounted connectors

 

 

 

 


distributed daqlink4

Vibrators or Impulse Sources

 

 

Other DAQlink 4 Connection Options:


 

Besides the Network Extender option, seismograph networks can be constructed using the 100Base-T network

Cable Solution - 100 meters maximum between network switches

WiFi solution - typical line of sight or 1 Km with 900 MHz units (distance depends on environment)

Cellular Data Modem Solution – Connect each DAQlink4, or the entire DAQlink 4 system, to a cellular data modem and download data from anywhere via the Internet


  dist daq4 5

2D or 3D Acquisition

 

 

Distributed DAQlink 4 Trigger Options:


Cabled solution - wired trigger signal is connected to each DAQlink unit

VHF Radio solution - Wireless Trigger box is connected to each unit - Trigger signal is sent via VHF radio

GPS solution - if all DAQlinks units have GPS synchronization, then the triggering will be synchronized via the GPS time. Only one DAQlink needs to be wired to the trigger signal. The other DAQlinks will start at correct GPS time via Ethernet commands from the Vscope software.

Trigger Storage - with the DAQlinks continuously recording with GPS synchronization, store the GPS trigger times at the Source Points and Post process Shot Records.

 

distributed daqlink4

 

Downhole Recording

 

 

MegaDAQ - Multiple DAQlink 4 Seismographs
in a single chassis
 

 

 
 

dist daq4 stack

  240 channel system
   
  MegaDAQ (DAQlink 4S Seismograph)

All connectors have been relocated to the side of the case, enabling DAQlinks to be stacked.

With the connectors centralized, cable runs are shorter and easier to maintain.

With the seismograph modules in a central location, they can be networked for real-time data.

MegaDAQ configurations utilize a single GPS module for consistent timing.

The MegaDAQ configuration packs the largest number of channels into the minimum amount of space.


Includes VibraScope Software:

distributed daqlink4

  Functions:
Configures DAQlink 4 for Acquisition
Monitors Seismograph Operation
Offloads and Evaluates Data
  Features:
Data Display
Analysis – Amplitude & Phase Spectra
RMS Noise and Signal Graphs
  Expansion:
For larger systems, DAQlink 4 seismographs are compatible with the full line of iSeis Sigma Field Software, including Source Link & Sigma Observer.

Distributed DAQlink4 Specifications:
Electrical:
 

A/D

 

24 bit sigma delta converter

 

Anti-Alias Filters

 

85% of Nyquist frequency

 

Low Cut Filter

 

User Selectable from 0.001 Hz to 120 Hz

 

Filter Type

 

Linear Phase

 

Sample Rates

 

125 to 64,000 sps

 

PreAmp Gain

 

x1 (0 dB) and x16 (24 dB)

 

Max Input Voltage

 

±3.7 Volts @ x1 Gain

 

Bandwidth

 

DC to 20 kHz

 

Power Usage

 

Typically 0.13 watts per channel

 

Input Impedance

 

100k Ohms

 

Clock Sync

 

GPS, VHF Radio

 

Power Supply

 

9-28 VDC

Physical:
 

Number of Channels

 

24

 

Temperature

 

-40°C to +85°C

 

Humidity

 

0 to 100%

 

Size

 

11.0" x 9.7" x 2.1" (280 x 246 x 53 mm)

 

Weight

 

6.2 lbs (2.8 kg)

 

Data Storage (Internal 16GB CF)

 

120 hours (24 channels @ 500 sps)

 

Data Storage (on Computer)

 

Unlimited

 

Data Storage (External USB)

 

Unlimited

 

Data Format

 

SEG-2, SEG-D, SEG-Y, ASCII, MiniSEED

 

LEDs

 

Network, Status, Battery

Performance @ 500sps:
 

Trigger Accuracy

 

±1µs

 

Dynamic Range

 

Better than 124 dB

 

THD

 

0.00008 %

 

Crosstalk

 

Better than -125 dB

 

Common Mode Rejection Ratio

 

Better than 100 dB

 

Noise Floor

 

< 0.2 µV RMS @500sps

Connectors:
 

Computer Network

 

10-pin Weatherproof

 

GPS

 

6-pin Weatherproof

 

Trigger

 

3-pin Weatherproof

 

Power

 

2-pin Weatherproof

 

Auxiliary Data

 

14-pin Weatherproof

 

USB Memory

 

19-pin Weatherproof

 

Seismic Data

 

55-pin Weatherproof

 

Network Backbone

 

10-pin Weatherproof (2 ports)

Downloads:

  Distributed DAQLink4 Brochure Download Distributed DAQLink4 Brochure

Seismic Source Co

2391 E. Coleman Rd.
Ponca City, OK 74604
Phone: (580) 762-8233
Fax: (580) 762-1785
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