What is Vernier Scale?
Vernier Scale is a number of measuring lines added to micrometers, stirrups and weight devices to improve measurement accuracy. It was created by French mathematician Pierre Vernier in 1631. The principle is to place the second scale next to the primary scale with a different spacing of the scale line. This is usually ten lines or units for every nine primary scale. The human eye is quite furious in determining when the lines fall on each other, which is the way in which Vernier's reading is obtained. For example, if the measurement indicated between 50 and 51, regardless of units, Vernier will be on the main scale in accordance with the main scale worth between 51 and 60. Vernier scale will usually show lines 0 to 10, so if the alignment occurs in 7 on Vernier scale, the measurement would be 50.7.
micrometers and calipers used for accurate machining need accuracy to very small values. These devices usually have a stationary arm and a movable arm to adapt to the shape of an object, with a meterby the scales along the movable arm. Often, accuracy is required to a thousandth of an inch or millimeter. Setting Vernier's scale for reading 20 additions for every 19 on the main scale can further improve this accuracy. Vernier's swivel scales can add additional accuracy by using the circuit of the circle of the dial that adds additional accuracy.
Vernier scale can be flat scale, as with sliding caliper to measure inside or external dimensions of objects. Dial micrometers are commonly used to measure the external dimensions of smaller objects, while the weights of the rotary dial offer higher accuracy. Laboratory balance used to measure the exact weight of laboratory samples can use a dial or slide dial with vernier to ensure greater accuracy.
other devices also use Vernier scale for measurement accuracy. Sextants, used by sailors for heavenly navigation, use Vernier's measures to measure the angles of the sun or stars over the horizon. The rules of images, analog mechanical computers invented in the 16th century, use Vernier Scales to improve the accuracy of mathematical calculations. The rules of images were commonly used for construction, engineering and aviation until electronic calculators and computers have become available to the average consumer at the age of 70.