Sine and cosine encoder signal processing device compatible with multiple protocols and multiple types

Abstract

The invention relates to a sine and cosine encoder signal processing device compatible with multiple protocols and multiple types. The device can be compatible with sine and cosine encoder signals compatible with multiple protocols and multiple types, and processes the sine and cosine encoder signals by adopting different signal paths to obtain high-resolution position information. The problems that in an application system, different encoders need to be connected into different types of encoder signal processing devices, circuits are complex, and disassembly and connection are difficult are solved. The device comprises an encoder signal input interface, an electric signal processing circuit and a single-chip general processor. The electric signal processing circuit comprises a reference point signal processing circuit, an incremental sine and cosine signal processing circuit, a single-circle sine and cosine signal processing circuit, a synchronous serial signal processing circuit andan asynchronous serial signal processing circuit, and the single-chip general processor processes input signals through different signal paths to obtain period counting information, position subdivision information and single-turn absolute position information, and obtains high-resolution instant position information after splicing and integration.

Description

technical field [0001] The invention relates to the fields of numerical control machine tools, robots and servo control technologies, and in particular to a multi-protocol and multi-type sine-cosine encoder signal processing device. Background technique [0002] Photoelectric encoders are sensors that convert mechanical geometric displacements into electrical signals such as pulses or digital quantities. They are widely used in industrial fields such as CNC machine tools, robots and servo control technology to obtain position and speed information. [0003] The sine-cosine encoder obtains high-resolution position information by performing specific subdivision operations on the output sine-cosine signal. Compared with the square-wave incremental sine-cosine encoder, it can obtain more delicate position information under the same physical scale. Position information, and the resolution of the calculation speed is higher, and the speed is not affected by the signal frequency, s...

AI Technical Summary

Problems solved by technology

[0004] When the sine-cosine encoder is powered on, it needs to obtain the initial position information of the rotor first, which can be realized by different design techniques. The single-reference point or multi-reference sin-cosine signal encoder obtains the single-turn absolute position information according to the reference point Z signal, while the Some modern encoders use a serial protocol interface to directly obtain the absolute position information of a single circle by analyzing the serial protocol signal, which leads to the difference between the sine and cosine encoders, and the output signals of different sine and cosine encoders are also very different , so that different types of encoder signal processing devices need to be connected in the application system to process the encoder signal, which leads to more complex hardware circuits and is very inconvenient to use

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