Position sensing chip interface circuit realized based on Tamagawa protocol

Abstract

The invention provides a position sensing chip interface circuit realized based on a Tamagawa protocol, which is used for solving the problems of low integration degree, high cost and low compatibility in the application scene in the prior art, and comprises a slave interface electric module, a communication signal line module and a host decoding module; an RS485 is connected between the host decoding module and the slave interface module in a hanging mode to form a communication signal line module. The position sensor chip interface circuit is completely compatible with communication instructions, data formats and time sequence details specified by the Tamagawa protocol. In addition, the host decoding module and the slave interface module are kept consistent in the aspects of baud rate, communication data format and RS485 communication protocol by following a Tamagawa asynchronous serial communication mode. According to the invention, the localization level of the domestic serial absolute sensor chip can be improved, the problem of compatibility with mainstream communication protocols in the market is solved, and the competitiveness of the domestic same type of chips is greatly improved.

Description

technical field [0001] The invention relates to the technical field of automatic measurement, in particular to a position sensing chip interface circuit realized based on the Tamagawa protocol. Background technique [0002] With the rapid development of modern technology, precision equipment in the field of industrial control, such as precision grinding machine tools, processing robots and other servo control systems, have higher and higher performance requirements. Many synchronous motors require very accurate position sensing to achieve reliable control. Absolute position sensing Due to its good anti-interference performance and reliable location data, the sensor chip provides a convenient solution for various application scenarios that require location information and corresponding speed information. The absolute sensor chip converts the real-time position of the device under test into a digital signal, and sends it to the host through a specific communication interface p...

AI Technical Summary

Problems solved by technology

[0004] The current domestic application solutions usually use the mature absolute sensor chips of various manufacturers to obtain position information, and generally need to purchase corresponding decoding chips or corresponding PLC decoding solutions, which basically stay at the level of system application and direct integration. Domestic technology The blank directly leads to the increase of the cost of the actual product, and the integration degree of the actual application scheme is low. Although some decoding schemes have appeared at present, the localization of the slave interface circuit inside the chip cannot be realized.

Specific to the domestic solution of the Tamagawa protocol, which is closely related to this patent, Tamagawa currently provides AU5661 and AU5688 dedicated conversion chips for the serial absolute sensor chips produced by Tamagawa to realize decoding, but this conversion chip must be used An intermediate interface circuit is also required, which makes the design of the implementation complex, the degree of integration is low, and the AU5688 is expensive

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