Views: 0 Author: Site Editor Publish Time: 2022-08-01 Origin: Site
A three-coordinate measuring instrument refers to an instrument that can express measurement capabilities such as geometric shape, length and circumference indexing within the space range of a hexahedron, also known as a three-coordinate measuring machine or a three-coordinate measuring bed. The three-coordinate measuring instrument can also be defined as "a detector that can move in three directions and can move on three mutually perpendicular guide rails. The detector transmits signals in a contact or non-contact manner, and the displacement of the three axes A measuring system (such as a grating ruler) calculates each point (x, y, z) of a workpiece and an instrument for measuring various functions through a data processor or computer. The measurement functions of the CMM should include dimensional accuracy, positioning accuracy, geometric accuracy and contour accuracy.
The image measuring instrument is based on artificial intelligence technologies such as automatic edge extraction, automatic matching, automatic focusing, measurement synthesis, and image synthesis based on machine vision. Image map target guidance, full field of view eagle eye zoom and other excellent functions. At the same time, based on the automatic focusing process under the precise control of machine vision and micron, it can meet the needs of auxiliary measurement under clear images, and can also add a contact probe to complete coordinate measurement. 
Excellent software performance that supports spatial coordinate rotation, batch measurement and SPC result classification can be performed when workpieces are placed randomly or using fixtures. The instrument is suitable for all application fields for the purpose of two-dimensional plane measurement. These fields are: machinery, electronics, molds, injection molding, hardware, rubber, low-voltage electrical appliances, magnetic materials, precision hardware, precision stamping, connectors, connectors, terminals, mobile phones, home appliances, computers (computers), liquid crystal TVs (LCD) , printed circuit boards (circuit boards, PCBs), automobiles, medical equipment, etc.
After the introduction, everyone has a basic understanding of the three-coordinate measuring instrument and the image measuring instrument, so what is the difference between the two? Let's continue reading.
The difference between a three-coordinate measuring instrument and an image measuring instrument can be mainly explained from three aspects, namely, the measurement dimension, the measurement method and the measurement workpiece. Below, I will introduce these three aspects one by one.
1. Different measurement dimensions
The measurement dimension of a three-coordinate measuring instrument is a three-dimensional coordinate system, and the measurement dimension of an image measuring instrument is a two-dimensional space coordinate system. It can be seen that, compared with the image measuring instrument, the three-coordinate measuring instrument can measure the coordinates of one more dimension, which also means that the measuring accuracy of the three-coordinate measuring instrument is very high.
2. Different measurement methods
After talking about the differences in measurement dimensions, let's take a look at the specific differences between the two in terms of measurement methods.
There is a certain difference in the measurement methods of the three-coordinate measuring instrument and the image measuring instrument. The three-coordinate measuring instrument needs to be in contact with the object to be measured when measuring, and continuously obtain the three-dimensional coordinate value of the contact point, and finally obtain the measurement result. The image measuring instrument does not need to be in contact with the object to be measured, and the image measuring instrument can measure through the optical lens. There is no difference between the measurement methods of the coordinate measuring instrument and the image measuring instrument, but the applicable scenarios are different.
3. Mainly measure different types of workpieces
Through the introduction of "different measurement dimensions" and "different measurement methods", everyone has a certain understanding of the measurement of three-coordinate measuring instruments and image measuring instruments. It is precisely because of these two differences that there is a difference in the type of measurement between the coordinate measuring instrument and the image measuring instrument. For thin and light workpieces, the CMM cannot play its advantages. In contrast, in scenarios where three-dimensional data needs to be measured, image measuring instruments cannot measure. It can be seen from this that the coordinate measuring instrument and the image measuring instrument are actually a pair of complementary devices.
