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According to the basic content of length measurement, it can be known that length measurement is a process in which the measured value is compared with the true value of the measured value, and the result of the comparison is used as the value of the measured object to carry out the experiment. Generally speaking, in specific length measurement, the basis of operation is the base surface of the object to be measured, which is mainly composed of points and lines. Therefore, in the specific length measurement practice, it is necessary to clarify the base surface to be measured, and the distance between it and the other surface can only be measured on the basis of doing a good job of the base surface. The next thing that needs to be considered is how to complete the positioning of the measuring workpiece. It is necessary to ensure that the position of the workpiece can be measured well without increasing the difficulty of the measurement. The accuracy of the measurement must be improved in the simplest way. For the selection of the measurement base surface, it is necessary to strictly follow the relevant principles to ensure that the design and process, as well as the height of the measurement and assembly base surface are consistent. However, in specific practical operations, due to the influence of various unstable factors, there will often be inconsistencies between the process base and the design base, which results in changes in the measurement base. At the same time, in order to further improve the accuracy between the length measurements, it is necessary to establish a variety of standard devices while improving the length reference. The accuracy of the next level of standard device is lower than that of the previous level. , So the number of standard devices of the next level is far more than that of the previous level. With the help of this step-by-step comparison, the unit value presented by the standard can be conveyed from top to bottom and applied to length instruments and measuring instruments.
The above is an introduction to the related knowledge of the instrument by the editor of the customized Measurement instrument.