Absolute measurement and incremental measurement are two common measurement methods:
Absolute measurement refers to obtaining absolute measurement results by directly measuring the actual value of the measured object.
For example, measuring with a length measuring instrument can directly obtain the length value of the object to be measured.
Incremental measurement refers to the relative comparison of the difference between the measured object and the standard object to obtain the measurement result of the measured object. For example, when measuring with calipers, you can compare the measured object with the standard size on the caliper to obtain the dimensions of the measured object.
Indirect and direct measurements are classified according to the measurement method:
Direct measurement refers to the direct measurement of the measured object to obtain direct measurement results. For example, when measuring a person's weight using a scale, you can get the person's weight value directly.
Indirect measurement refers to the measurement results of the measured object through the measurement of other parameters related to the measured object, after calculation or derivation.
For example, when measuring a person's height, a ruler or measuring instrument can be used to measure the height of the person, and then the height value of the person is calculated by calculating.