In
an ancient time, it is very difficult for traders and merchants to value the
goods in return of money. Weighting machine have been discovered in 2000 BC in
Indus river valley. Before only 2 plates were used which was attached to the
beam in the center pole? Things was measured by putting the objects on one side
of the plate and on second side
weighting stone was placed until it reaches to equilibrium for measurement of
things.
This
one was a perfect balanced instrument and easily measured the weight of goods
with its accuracy, but expert cheaters were there to cheat people. The perfect
technological development did not start till 18th century as there
was no much improvement in industrial area. In 1770s, a British inventor has
invented the spring balance to know the accuracy of goods in the different
fields. The pressure gets created or exerted on the spring of the instrument
and then its perfect weight is measured. This became famous and fairly ran for
a longer time, even it is perfect for many people till this date. But, the only
problem is a cent percent accuracy. This cent percent accuracy can be seen in a
Digital Weighing Machine.
Compound
lever system
This
effective and an accurate way of weighing machine were completely based on the
lever and its platform and it was invented to make the weight much more convenient.
The load can be placed anywhere on the platform the measurement can easily
transferred to the lever of the central part. The supportive knife-edges of the
lever transferred the weight to its central part. The
lever on the other end now gives reads and gives the result according to that.
The completely proper solution was provided and it gave that how the error
detection took place and one pound in each ton. His invention made the work
easi and reliable to almost everyone in England.
Electronic
Weighing Machine
Later
by 1940s weighing machine is
introduced in electronic form where
loads cells are placed in every electronic machine whose main role is to
convert weight into electronic signals. Load cells contain thin and metal foil
transistors which are in electronic form known as strain gauges. In simple way
when any load is applied it will lead to the compression of strain gauges which
will results in change of electrical resistance which will change its output
signals in proportion of weight.
The
function of the modern digital weighing machine for measuring work with a great
efficiency and thus people still use this effective way of weighing machine. A
number of different types of weighing machines are- digital scales, pocket
scales, beam scales, spring balances and industrial scales. Thus, it is very
important for people to get the right weighing scale to eradicate the problems
of weighing. This is the reason of a number of inventions, but finally the
electronic weighing machine has done everything perfect.
