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Rotary encoder and resolver！
Changchun Rongde Optics Co.,Ltd. Release time：2016/7/12 Browse：611Rotary encoder and resolver
The rotary encoder is a rotating mechanical displacement amount is converted to an electrical signal, the signal post-processing to detect the position of the speed sensor. When the rotary encoder grating disk drive shaft rotates, the light emitted by the light emitting element is the grating disk slot cut into intermittent light receiving element and generate an initial signal. The signal processing circuit after subsequent output pulse or code signal.
Based on the detection principle, the rotary encoder can be divided into optical, magnetic, inductive and capacitive. The method according to the scale and form of the output signal can be divided into incremental, absolute and mixed three.
When the incremental encoder shaft rotates, there is a corresponding phase output. Discrimination and increase or decrease the number of pulses of the rotational direction, to the rear of the circuit requires the use of judgment and counter. When the absolute encoder shaft rotates, there is correspondence with the position code (binary, BCD code, etc.) output from the code changes the size of the positive and negative directions to determine the location and displacement, without judgment to the circuit.
Resolver is referred to as "resolver", is currently a more professional name. Rotary transformer is mainly used for motion servo control system, as the angular position sensing and measurement. Early rotary transformer means for, as the computer simulation of one of the main components of the calculation resolution. Its output is a function of some kind with the rotor angle for varying electrical signal, usually a sine, cosine, linear and so on. These functions are the most common, and it is easy to achieve. In the pair of windings designed to do, it can produce electrical output of some special functions. But this function is only used for special occasions, it is not universal.
Similar to the encoder, resolver also the mechanical motion into electrical signals of a rotary electromechanical device. But it is different from the encoder, resolver transmission rotary transformer; rotary encoder are analog signals, not digital signals. Structure, made a rotary transformer primary winding and a secondary winding two-phase composition at 90 ° mechanically. The output signal of the rotary transformer needs to be able to convert the signal controller circuit input analog signal.
The rotary encoder is a rotating mechanical displacement amount is converted to an electrical signal, the signal post-processing to detect the position of the speed sensor. When the rotary encoder grating disk drive shaft rotates, the light emitted by the light emitting element is the grating disk slot cut into intermittent light receiving element and generate an initial signal. The signal processing circuit after subsequent output pulse or code signal.
Based on the detection principle, the rotary encoder can be divided into optical, magnetic, inductive and capacitive. The method according to the scale and form of the output signal can be divided into incremental, absolute and mixed three.
When the incremental encoder shaft rotates, there is a corresponding phase output. Discrimination and increase or decrease the number of pulses of the rotational direction, to the rear of the circuit requires the use of judgment and counter. When the absolute encoder shaft rotates, there is correspondence with the position code (binary, BCD code, etc.) output from the code changes the size of the positive and negative directions to determine the location and displacement, without judgment to the circuit.
Resolver is referred to as "resolver", is currently a more professional name. Rotary transformer is mainly used for motion servo control system, as the angular position sensing and measurement. Early rotary transformer means for, as the computer simulation of one of the main components of the calculation resolution. Its output is a function of some kind with the rotor angle for varying electrical signal, usually a sine, cosine, linear and so on. These functions are the most common, and it is easy to achieve. In the pair of windings designed to do, it can produce electrical output of some special functions. But this function is only used for special occasions, it is not universal.
Similar to the encoder, resolver also the mechanical motion into electrical signals of a rotary electromechanical device. But it is different from the encoder, resolver transmission rotary transformer; rotary encoder are analog signals, not digital signals. Structure, made a rotary transformer primary winding and a secondary winding two-phase composition at 90 ° mechanically. The output signal of the rotary transformer needs to be able to convert the signal controller circuit input analog signal.
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