FerPi el5-21 group student’s haydaraliyev javohir’s presentation

FerPi EL5-21 group student’s HAYDARALIYEV JAVOHIR’S PRESENTATION

HISTORY OF THE DEVELOPMENT OF METROLOGY
PLAN:

• What can you say about the history of measurement?
• What is the history of measurement?
• Why was the SI system of measurement developed?

What can you say about the history of measurement?

Since the beginning of time, measurements have played a major role in history. They served as a valuable frame of reference that enabled ancient civilizations to build, trade and create. We still carry many of these basic measurement principles with us today and use them in the modern world.

The first measuring tools were actually based around the human body, which is how some of today’s measurement standatrs got their name. An inch was considered the width of a thumb, a foot was just that—the length of a foot—and a yard was the length of a man’s belt.

Luckily, we’ve come a long way from the days of using belts, thumbs and cubits for measurement, but it’s always nice to know more about the tools you use every day. Let’s take a look at some of the most popular measuring tools we use on job sites and see how they evolved into the modern tools we depend on today.

Luckily, we’ve come a long way from the days of using belts, thumbs and cubits for measurement, but it’s always nice to know more about the tools you use every day. Let’s take a look at some of the most popular measuring tools we use on job sites and see how they evolved into the modern tools we depend on today.

Measuring Wheels – Going the Distance

Example of a measuring wheel from the 1800s. –Source

You may know the measuring wheel by many different names – surveyor’s wheel, click wheel, hodometer, waywiser or trundle wheel. Regardless of what you call this trusty device, measuring wheels have been around for centuries, helping professionals measure distances easily and accurately.

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What is the history of measurement?

“Timeline of Important Dates In The History Of The Metric System

• 1668: John Wilkins proposed an integrated system of measurement, similar to the metric sytem.
• 1670: Gabriel Mouton proposed his decimal system of measurement based on a fraction of the Earth’s circumference.
• 1671: Jean Picard proposed the swinging pendulum as a measure of length. 1790: The National Assembly of France asked the French Academy of Sciences to create a standard system of weights and measures.
• 1795: France adopted the metric system.
• 1840: French government required all Frenchmen to convert to the metric system.
• 1866: Congress legalized the use of the metric system in the United States. However, its use was not required.
• 1875: The Treaty of the Meter was signed at the close of the International Bureau of Weights and Measures conference.
• 1957: The U.S. Army and Marine Corps adopted the metric system. Used as the basis for their weapons and equipment.
• 1965: Great Britain began adopting the metric system.
• 1988: Congress passed the Omnibus Trade and Competitiveness Act. This act called for all federal government agencies to use the metric system for business by the end of 1992. ”

Why was the SI system of measurement developed?

• The metric system began as the legal system of measurement in France during the 1800's. It was designed to replace the misunderstood and mixed-up units that were in use at the time.
• Despite wars and international rivalries, the metric system has slowly spread throughout the world, although not all countries have completely adopted it. For example, England is only just changing weight system over to metric (as part of the formation of the European Union). The United States of America measure almost everything using the older imperial system of measurements, which includes things like the foot (for distance) and the pound (for weight). However, scientists in both countries use the metric system when communicating with the international scientific community.

Some Significant Dates

• 6th century BCIn Egypt, the "cubit" was widely used as a standard measurement of length. It was equivalent to the length of a man's arm from the elbow to the tip of the middle finger. But which man? (not all cubits were equal).
• 1585Metric system began in France
• 1840Metric system established as the legal system of measurement in France
• 1960S.I. units adopted by the General Conference on Weights and Measures -- the sixth such conference since 1840. The International System was a modern form of the metric system.
• 1965Australian pharmaceuticals industry converted to the metric system
• 1966Decimal currency introduced in Australia
• 1971 - 1982Conversion to metric system in Australia - one industry after another
• 1982S.I. established in Australia as the "main" language of measurement; most countries had already converted or were in the process of converting.

S.I. BASIC UNIT’S

SI - System Internationale is a system of basic and derived units of physical quantities. Adopted at the 11th General Conference on Weights and Measures held in Paris (1960). The international system of units consists of seven basic units, two additional units and derived units.

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