Decoding device and method for rotary transformer based on single FPGA (Field Programmable Gate Array)

Abstract

The invention discloses a decoding device for a rotary transformer based on a single FPGA (Field Programmable Gate Array), which comprises a DSP (Digital Signal Processing) control circuit, an FPGA circuit, an analogue-to-digital conversion circuit, an input signal conditioning circuit, an output excitation signal buffer circuit and a rotary transformer; the FPGA circuit is electrically connectedwith the analogue-to-digital conversion circuit; the input end of the output excitation signal buffer circuit is electrically connected to the analogue-to-digital conversion circuit, while the outputend of the output excitation signal buffer circuit is electrically connected to the rotary transformer; the output end of the rotary transformer is electrically connected to the input signal conditioning circuit; the output end of the input signal conditioning circuit is electrically connected to the analogue-to-digital conversion circuit; and the DSP control circuit is electrically connected with the FPGA circuit. Meanwhile, the invention also provides a decoding method; an analogue-to-digital conversion circuit is gated by the FPGA circuit; and the gated rotary transformer is subjected to acquisition and calculation of angle position, velocity and acceleration of a motor. The aim of simple communication among peripheral circuits and the modules and flexile system structure is realized.

Description

technical field [0001] The present invention relates to the field of rotary transformers, in particular to a single FPGA-based rotary transformer decoding processing device and method. Background technique [0002] In the force loading control system, it is necessary to perform closed-loop control on the angular position and speed of the motor to achieve high-fidelity force loading. Therefore, the accuracy of angular position and speed measurement is very critical to the system. The traditional angular position and speed detection is mainly based on the photoelectric encoder, but half of the black and white dividing line of each code track of the photoelectric encoder is always aligned with the black and white dividing line of the adjacent inner ring code track, so that the black and white The inaccurate delineation of the demarcation line causes shortcomings such as rough errors. With the development of the electronic industry and the improvement of the integration of elect...

AI Technical Summary

Problems solved by technology

The traditional angular position and speed detection is mainly based on the photoelectric encoder, but half of the black and white dividing line of each code track of the photoelectric encoder is always aligned with the black and white dividing line of the adjacent inner ring code track, so that the black and white The inaccurate delineation of the demarcation line causes shortcomings such as rough errors. With the development of the electronic industry and the improvement of the integration of electronic components, the signal processing circuit of the resolver becomes simple and reliable, and the price is also greatly reduced. Therefore, the resolver is used to realize The method of angular position and speed detection has been widely used in aerospace, industry, transportation and civil fields due to its advantages such as wide speed range, high precision, good dynamic response, simplicity and reliability.

At present, most resolver signal decoding is completed by a dedicated resolver analog-to-digital conversion circuit, and the microprocessor and CPLD are used to jointly complete the corresponding control, but the communication between the peripheral circuit and each module is more complicated, and System structure is not flexible

Images