What is Digital Electronic Weighing Scale and How it works?
Digital electronic weighing scale is a device used to
measure mass or weight. It works with the use of a strain gauge load cell. If
you see the analog scales, it uses springs to indicate the weight of the
object, while digital scales convert the force of a weight to an electric
signal.
What does this scale measure?
The answer is force! And the way in which the scale is
constructed. This display the human weight in newtons. But, in normal it will
indicate the weight in kilograms.
The Kamtech Weighing Scale is split into two parts
for understanding. The first part is the sensing part and the second one is the processing part.
The sensing part – essentially has a collection of sensors that
measure the weight and convert it into an electrical form for processing.
Processing
part – this receives the signal and displays it on the
LCD for a readout. The sensor that is used for measurement is known as
load-cells.
Basically, a load cell is a transducer, – which means it
converts one form of energy into converts a force into an electrical signal.
The load cells have a set of strain gauges that deformed while applying
pressure. This is measured as an electrical signal and is suitable for processing.
The fact that applied strain changes the electrical
resistance of the wire. Usually, a load cell has 4 strain gauges that are
connected as a Wheatstone bridge. One can view a collective output of 4 strain
gauges obtained in the order of a few millivolts. The arrangement looks like
the object placed on the platform exerts the force on the item placed beneath
it.
The transducers then generate an electrical signal that
is amplified by the use of a high-quality signal amplifier for it to be suitable in
the ensuing sections of the electronics in the device.
After the amplification signal is taken out by the processing
part, then it converts the analog voltage into a digital form with the help of
a precision analog to digital converter then it will display on the digital
readout.
This part of processing and digital read-out is handled
by the use of the Microprocessor Control Unit (MCU). Based on design necessity, it
performs other necessary operations. It is the maintenance of zero adjustments,
statistical data, interface to a PC system, etc.
Usually, the care is taken to calibrate the devices
before they are used. Why this is performed? It is because of the uniqueness of the components used in them. This is the major step, without which the device
provides you with the wrong reading.
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