Incremental encoder disconnection detection method and circuit with uvw magnetic pole signal

Abstract

The invention discloses an incremental encoder disconnection detection method with UVW magnetic pole signal and its circuit, which adopts three D flip-flops connected in series, the input of the first D flip-flop is connected to a high level, and the third The output of the D flip-flop is the disconnection error output; the U, V, W signals are respectively used as the clock signals of the three D flip-flops; the A phase / or B phase signal is used as the reset signal of the three D flip-flops; when the A phase / or when the B-phase signal is disconnected, after being triggered by the U, V, and W signals, the high-level signal will be transmitted to the output of the third D flip-flop, and at this time, the A-phase / or B-phase is detected The signal is disconnected. After adopting the above solution, the present invention only needs three D flip-flops to realize the disconnection detection of phase A or phase B of the incremental encoder with UVW magnetic pole signal, the detection method and circuit are very simple, and the practicability is strong.

Description

technical field [0001] The invention belongs to the field of encoder signal processing, and in particular relates to an incremental encoder disconnection detection method and a circuit thereof. Background technique [0002] Incremental encoder is a kind of sensor that converts the displacement of rotation into digital pulse output. Because of its durability, strong anti-interference ability, high precision, and simple use, it has important applications in many fields, especially in the field of motion control. [0003] There are two types of incremental encoders, one is ABZ signal with UVW magnetic pole signal, and the other is only ABZ signal, in which the A phase and B phase signals are two pulse signals that are orthogonal to each other, and the Z phase is the origin signal , The UVW phase is 3 magnetic pole signals with a phase difference of 120 degrees. The application of the present invention is aimed at an incremental encoder with UVW magnetic pole signals. [0004...

AI Technical Summary

Problems solved by technology

[0004] In the control situation with incremental encoder as feedback, when A phase or B phase disconnection occurs, if the alarm cannot be given quickly, it is very likely to cause control errors, which will seriously cause mechanical damage and casualties. Therefore, Encoder disconnection detection is very important to the system

[0005] The existing incremental encoder disconnection detection method with UVW magnetic pole signal, most of the steps are cumbersome, the detection circuit is complicated, and the practicability is poor

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