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Acquisition systems (PDF)
ALT’s family of acquisition systems
is based on modern electronic design in which software control
techniques have been used to the best advantage. The hardware
incorporates the latest elextronic components with embedded systems
controlled via the specifically developed ALTlogger Windows interface
program.
ALT borehole logging systems can be supplied as compact portable
units or can be mounted on logging vehicles.
  
Main features
• high speed USB interface
• Self selecting AC power source
from AC 100V to AC 240V
• Ruggedised system, heavy
duty, fault tolerant
• Interfaces downhole probes
from many manufacturer
• Wireline and winch flexibility
(runs on coax, mono, 4 or 7 conductor wireline)
• Compatible with most shaft
encoder (runs on any 12V or 5V quadrature shaft encoder with any
combination of wheel circumference/shaft pulse per revolution)
• Totally software controlled
• Very easy to use, with graphical
user interface (dashboard), self diagnostic features, configurable
through files and minimal technical knowledge needed from the
user
• Runs on any notebook PC compatible
Windows 2000& Windows XP
• Real time data display and
printing
• Support Windows supported
printers and Printrex thermal printers
• Optional network enabled
distributed architecture
ALTlogger 19” rack and minirack
The rack system has been designed to accommodate multivendor tool
types. The modular and flexible design architecture of the system
will allow virtually any logging tool to run on any winch supposed
the required Tool Adapter and Depth Encoder Adapter is inserted
into the ALTlogger Unit. Any new combination of logging tool and
winch unit will just require selection of the proper ALTlog.ini
File and the proper Tol-file.
The Tool adapter is the software and hardware suitable to interface
a specific family of tools. It provides the interface between
a tool specific power, data protocol and wireline conductor format
and the system core. When a logging tool is selected for use,
the system automatically addresses the type of adapter associated
with the tool.
The latest Digital Signal Processing (DSP) adapter adds even more
flexibility to the system with expansion slots for future development
and upgrades. This adapter is a 100% firmware based modem, which
makes a specific tool adaptation possible at minimum cost for
the end user.
If you want to get the updated list of tools
that can be interfaced to the system,
contact: support@alt.lu
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Matrix
The well logging tool industry has seen the multiplication of
telemetry standards with constantly evolving specifications and
performance. Matrix is a revolutionary system. It consists of
a Digital Signal Processor (DSP) directly linked with the wireline
through a pair of ultra fast high resolution A/D and D/A converters.
Telemetry details are handled by software providing unparalleled
flexibility and upgrade possibilities. The system automatically
identifies logging tool protocol without operator intervention.
If you want to get the updated list of tools
that can be interfaced to the system,
contact: support@alt.lu
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Acquisition
system software
The acquisition system ALTLogger software runs on Windows OS and
exploits the true pre-emptive multitasking ability of the Windows
NT Kernel.
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Dashboard
The heart
of the graphical user interface is called the Dashboard and
consists of multiple threads running concurrently and handling
specific system tasks. The dashboard is also the operator’s
control panel. It is used to select and control all systems
functions and to monitor data acquisition.
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Browser and processors (real time data monitoring)
A browser is a client process. The browser offers the operator
of the logging system a number of different on-line display facilities
to present log data on the screen in a user-friendly, easy controllable,
attractive layout. Depending on the tool category, different Browser
are used to display log data such as conventional curves, full
wave form sonic, borehole images…
Tol file
Information specific to a particular tool is contained in a unique
tool configuration file, which has the extension *. TOL Information
contained in the *TOL file is used by different components of
the system for initializing Dashboard components (tool power,
data protocol, etc…) as well as setting parameters for client
processes (browser and processors) handling data calibration,
data processing, data display or printing. A copy of the TOL file
is included in each data file acquired.
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