System and method for measuring and tracking resonance frequency

Abstract

The invention relates to a system and method for measuring and tracking the resonance frequency. The system mainly comprises a computer, a multifunctional data collecting card, a direct numerical frequency synthesizer and a sensor interface circuit. Compared with a traditional phase-locked loop circuit, a phase shifter is eliminated, interference of unnecessary units to signals is reduced, and the accuracy of the signals is improved. According to the system and method, measuring and tracking of the resonance frequency are simplified, the resonance frequency and changes of the resonance frequency can be conveniently observed in real time and automatically stored in a storage device, and the detection process is completely and automatically completed through the system without intervention of a technical person.

Description

technical field [0001] The invention relates to the technical field of instrument detection, in particular to a resonance frequency measurement and tracking system and method. Background technique [0002] The phenomenon of resonance can be said to be one of the most common and frequent natural phenomena in the universe. To some extent, it can even be said that resonance produces the universe and everything in the world. In the field of electricity, when the frequency of the excitation in the circuit is equal to the natural frequency of the circuit, the amplitude of the electromagnetic oscillation of the circuit will also reach a peak value, and a resonance phenomenon will occur. The excitation frequency at this time is the resonance frequency. Resonance phenomenon plays a very important role in daily life, industrial production and scientific research fields, so the measurement and tracking of resonance frequency has always been a concern of scientific researchers. [0003...

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Problems solved by technology

[0004] However, this method requires only one-to-one matching between the sensor and the interface circuit. When the sensor is replaced, the phase shifting unit in the circuit needs to be readjusted, which leads to poor fault tolerance of the system and cannot meet the needs of multi-function detection.

In addition, this stacked decentralized system needs to use large-scale equipment such as network analyzers and oscilloscopes, which is not only complex but also has a low degree of intelligence, and it is difficult to meet the on-site application requirements of industrialization and production and life. Therefore, an integrated small-scale intelligent system is urgently needed to realize Measurement and Tracking of Resonant Frequency

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