rotary pulse generator！

Pulse encoder is a rotary pulse generator, which converts rotating mechanical angle into electrical pulses, as position detection and speed detection devices.
    Pulse encoder is divided into: photoelectric, contact and electromagnetic induction.
    Is an incremental encoder pulse detection device, its type is defined by the number of pulses per revolution given to distinguish. 2000P / r, 2500 P / r and 3000 P / r and so on.
    Optical pulse encoder structure shown in Fig. In a disk (usually with vacuum coating glass disc) on the circumference of the engraved spaced equally fine-lined, divided into transparent and opaque parts, called disk-shaped main grating. The main grating and turn uranium rotate together. In the main circumferential position of the grating lines, the grating is placed in parallel with the primary indication of a fixed grating, which is a small segment workbook sheet formed with three slits. Wherein the difference between the two slits on the same circumference 1/4 pitch (resolution called slits), the other is called a slit slit zero, when one revolution, whereby the slits emit a pulse main grating. On either side of the main grating direction perpendicular to the main grating and instructions grating mounted fixed light source, optical receiving element. In addition, the signal processing for a printed circuit board. Optical pulse encoder connector servo motor connected through the cross, which is fixed to the motor flange end face shields cast, constituting a complete detection means.

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