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Frequency division method and system for any integer of orthogonal photoelectric encoder

A photoelectric encoder and arbitrary integer technology, applied in the field of arbitrary integer frequency division methods and systems of quadrature photoelectric encoders, can solve problems such as difficulty in ensuring that signals maintain a 90° quadrature phase relationship, and reduce the risk of logic competition , reduce the effect of metastability

Inactive Publication Date: 2012-12-26
合康变频科技(武汉)有限公司
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Problems solved by technology

The frequency division of digital logic signals generally adopts the method of cycle counting. This method has a good effect on the frequency division of a single signal, but it is difficult to ensure that the divided signal remains at 90° when used in the frequency division of orthogonal coded signals. The quadrature phase relationship of

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  • Frequency division method and system for any integer of orthogonal photoelectric encoder
  • Frequency division method and system for any integer of orthogonal photoelectric encoder
  • Frequency division method and system for any integer of orthogonal photoelectric encoder

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Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] Assume that when the quadrature photoelectric encoder rotates forward, pulse A is 90° ahead of pulse B, and when the quadrature photoelectric encoder is reversed, pulse B is 90° ahead of pulse A. The principle of the present invention is as follows: when the orthogonal photoelectric encoder rotates forward, such as figure 1 As shown, the state change of the input signal AB is After dividing by two, the state of the output signal A'B' changes to Quadrature encoder inversion, such as figure 2 As shown, the state change of AB is After dividing by two, the state of the output signal A'B' changes to After frequency division by n (any integer), the state of the ...

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Abstract

The invention relates to the technical field of any integers of orthogonal photoelectric encoders and discloses a frequency division method and system for any integer of an orthogonal photoelectric encoder. The method comprises the following steps: S1, synchronously sampling input signals AB, namely two paths of pulses A and B, of the orthogonal photoelectric encoder by using a reference clock and judging the rotating direction of the orthogonal photoelectric encoder according to the states of the input signals AB; and S2, obtaining the state of next clock of output signals A' and B' according to the rotating direction, a preset frequency division coefficient and the current states of the output signals A' and B', namely two paths of pulses A' and B', thereby obtaining pulse signals A' and B' subjected to frequency division. According to the frequency division method and system disclosed by the invention, the frequency division of any integer can be realized; and meanwhile, the signals subjected to frequency division are still enabled to maintain the 90-degree orthogonal phase relationship.

Description

technical field [0001] The invention relates to the technical field of arbitrary integer frequency division of orthogonal decoding signals, in particular to an arbitrary integer frequency division method and system of an orthogonal photoelectric encoder. Background technique [0002] A photoelectric encoder is a sensor that converts the mechanical geometric displacement of the output shaft of a motion mechanism (such as a motor) into a pulse or digital quantity by means of photoelectric conversion. It is generally used to detect the speed and direction of rotation of a motion mechanism such as a motor. Usually, the photoelectric encoder is coaxially installed with the motor and other moving mechanisms. When it rotates with the motor shaft, it will generate two phases proportional to the rotational speed. The structure composed of a motor and other moving mechanisms is called an orthogonal photoelectric encoder. The frequencies of the above two quadrature encoding pulses ref...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/36
Inventor 刘军锋姜向龙刘杰夏永强陈志勇
Owner 合康变频科技(武汉)有限公司
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