Motor absolute position detection device and method based on single-core bidirectional technology

Abstract

The invention relates to a motor absolute position detection device based on the single-core two-way technology. The motor absolute position detection device based on the single-core two-way technology comprises an upper computer, a driver module, an optical fiber and receiving-and-transmitting module, an encoder and a motor, wherein the upper computer, the driver module, the optical fiber and receiving and transmitting module, the encoder and the motor are connected in sequence. A motor absolute position detection method based on the single-core two-way technology comprises the steps that the upper computer controls the driver module to send a command word, and a first encoder photoelectric adapter circuit converts an electrical signal into an optical signal, and sends the optical signal to a second encoder photoelectric adapter circuit through an optical fiber; the second encoder photoelectric adapter circuit converts the optical signal into an electrical signal, and outputs the electrical signal to the encoder; the encoder sends encoder parameters to the second encoder photoelectric adapter circuit according to the electrical signal, so that the electrical signal is converted into an optical signal, the optical signal is sent to the first encoder photoelectric adapter circuit through the optical fiber, is processed in a photovoltaic conversion mode through the first encoder photoelectric adapter circuit, and is output to the driver module so as to be fed back to the upper computer, and position detection is accomplished. According to the motor absolute position detection device and method based on the single-core two-way technology, two-way high-speed communication between a driver and the encoder is achieved with only one optical fiber, reliability and real-time performance of serial communication of the encoder are improved, the transmission rate and the transmission distance of serial communication of the encoder are increased, the number of optical fibers is reduced, and the wiring cost is reduced.

Description

technical field [0001] The invention relates to a motor rotor absolute position detection method and device using single optical fiber bidirectional communication technology, which can be applied to robots and electric servo systems on industrial sites. Background technique [0002] The application of electric drive servo units in modern manufacturing industry is becoming more and more extensive. Whether it is a rotary motion system or a linear motion system, a certain precision position detection device is required to feed back the real-time position information of the actuator. Transmission of information using metal wire media is not only limited in bandwidth, but in large devices, long transmission lines often pose challenges for communication in terms of signal integrity and electromagnetic compatibility. [0003] In complex equipment such as robots, power cables and signal cables run parallel and intersect with each other inside the metal cavity. A communication erro...

AI Technical Summary

Problems solved by technology

Due to the high cost of transceivers and optical fibers for optical communication, and the fact that the bending of cables is limited when the two fibers are arranged side by side, their popularization and application are limited.

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