High accuracy number online dynamic balance detecting device based on FPGA

Abstract

The present invention provide an high-precision on-line dynamic balance detecting device based on FPGA and the device can perform an high-precision on-line detecting to the rotor of unbalance. The device generates a reference pulse by the photoelectric sensor when the rotor passes the reference position, and the pulse generates phase locking signals and frequency doubling signals through the FPGA chip. The frequency doubling signals springs the AD chip controlled by the FPGA to perform a sampling. Then, FPGA generates a sampling end signal and DSP responses to said signal, and the sampling value is read through the corresponding address unit. Then the amplitude value and phase of the unbalance is calculated according to a certain control arithmetic after that the sampling data of the whole circle is read. The device performs sampling and processing of signals in four circuits (the upper end X, the upper end Y, the lower end X and the lower end Y), and the unbalance of the rotor in the working rotating speed can be measured and the method has a great data processing ability and a quick response speed, thus, a higher balance precision can be achieved.

Description

technical field [0001] The invention relates to an FPGA-based high-precision digital on-line dynamic balance detection device, which is especially suitable for on-line detection of high-speed rotor dynamic unbalance. Background technique [0002] Rotor mass imbalance is one of the main causes of vibration in rotating equipment. Since the working speed of the magnetic levitation rotor or some mechanical rotors is relatively high, the size of the dynamic unbalance directly affects the control accuracy of the rotor, and then affects the output disturbance torque. If the unbalance is large, it will affect its floating and speed up for the magnetic levitation rotor, and even cause instability at high speed; for the mechanical rotor, it will increase its wear and reduce its service life. [0003] The dynamic balance detection of the rotor is the main method to eliminate this harmful vibration. Most of the existing dynamic balance detection devices are off-line dynamic balance de...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention: to overcome the shortcomings of the existing offline dynamic balance detection accuracy is not high, the sampling frequency of the existing online dynamic balance detection is limited, and the real-time performance cannot be guaranteed, and a high-precision digital online dynamic balance based on FPGA is provided Detection device

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