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Features of mechanical mouse
The photoelectric pulse signal generated by the grating signal sensor installed at the end of the roller column reflects the displacement change of the mouse in the vertical and horizontal directions, and then the movement of the cursor arrow on the screen is controlled by the processing and conversion of the computer program.
The original mouse only existed as a technical proof, and was not actually mass-produced. After the mouse was officially introduced into the PC, the corresponding technology was also innovated. The principle of positioning based on different resistances has been completely abandoned, and replaced by a "mechanical mouse" of pure digital technology.
Different from the original mouse, the bottom of this mechanical mouse does not have mutually perpendicular sheet-like round wheels, but instead uses a small gel ball that can be rolled in four directions. When the ball rolls, it will drive a pair of rotating shafts to rotate (respectively, the X rotating shaft and the Y rotating shaft). There is a circular decoding wheel at the end of the rotating shaft. The decoding wheel is attached with a metal conductive sheet that is in direct contact with the brush. . When the rotating shaft rotates, these metal conductive sheets and brushes will be in contact with each other in turn, and there are two forms of "on" or "off", the former corresponds to the binary number "1", and the latter corresponds to the binary number "0". Next, these binary signals are sent to the special chip inside the mouse for analysis and processing and generate corresponding coordinate change signals. As long as the mouse moves on the plane, the small ball will drive the rotating shaft to rotate, and then the on-off condition of the decoding wheel will change, resulting in a group of different coordinate offsets, which are reflected on the screen, that is, the cursor can follow the mouse's movement. Move and move.