What Is Data Logging
In
general, data logging means of all data generated by a device such as a lab
instrument, or the data passing through a particular point in a networked
computer system. Data logging is a common measurement application. In its most
basic form, data logging is the measuring and recording of physical or
electrical parameters over a period of time. The data can be temperature,
strain, displacement, flow, pressure, voltage, current, resistance, power, and
many other parameters.
A
wide range of products can be categorized as data loggers, from basic devices
that perform a single measurement to more complex devices that offer analysis
functions and integrated displays. In addition, data logging is used in a broad
spectrum of applications. Chemists record data such as temperature, pH, and
pressure when performing experiments in a lab. Design engineers log performance
parameters such as vibration, temperature, and battery level to evaluate
product designs. Civil engineers record strain and load on bridges over time to
evaluate safety. Geologists use data logging to determine mineral formations
when drilling for oil. Breweries log the conditions of their storage and
brewing facilities to maintain quality. The list of applications for data
logging goes on and on, but all of these applications have similar common
requirements. One question that we should answer is ‘How this data logging
works?’.
How data logging works?
Data
logger works with sensors to convert physical phenomena and stimuli into
electronic signals such as voltage or current. These electronic signals are
then converted or digitized into binary data. The binary data is then easily
analyzed by software and stored on a PC hard drive or on other storage media
such as memory cards and CDs.
There
are a few components that every data logger must have included:
·
Hardware to digitize what you are
logging, including sensors, signal conditioning, and analog-to-digital
conversion hardware
·
Long-term data storage, typically
onboard memory or a PC
·
Data-logging software for data
acquisition, analysis, and presentation
Follow
these steps when using a data logger:
· 1. Connect sensors like heat sensor,
resistance temperature detectors (RTDs), and accelerometers to the data logger
· 2. Use your data-logging software to
configure your data logger
· 3. Configure parameters like sample rate,
alarms, and start or stop conditions for your data-logging task with your
data-logging software
· 4. Run the data-logging task
·
After your hardware digitizes the sensor
measurements, analyze and store your data for future use
The
ability to take sensor measurements and store the data for future use is a
important characteristic of a data logger. However, a data-logging application
rarely requires only data acquisition and storage. Inevitably, you need the
ability to analyze and present the data to determine results and make decisions
based on the logged data. A complete data-logging application typically
requires the elements illustrated below.
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