A digitally controlled fault waveform capture and analysis method

Abstract

The invention discloses a digitally controlled fault waveform capture and analysis method, comprising the following steps: for a system composed of multiple DSPs, first select a control DSP; use the multiple DSPs to store and capture different waveforms, and sort them; Set up different data channels corresponding to multiple waveforms; use the control DSP to transmit different data channel information to the other multiple DSPs; form a ring array, and then perform waveform locking processing; let the control DSP upload the fault waveform after receiving the command. data; graphically display the data in the remaining multiple data channels; analyze the specific cause of the failure; the visualization and graphical image of the data of the present invention are intuitive, allowing people to see the changing trend and the interaction between the various data at a glance The impact can be grasped as a whole, and can be cleared for fixed analysis through waveform display. By latching multiple data waveforms, the work efficiency of fault analysis can be improved.

Description

technical field [0001] The invention relates to the technical field of fault detection and analysis, in particular to a digitally controlled fault waveform capture and analysis method. Background technique [0002] With the development of microelectronics and digital technology, the performance of modern CPUs has increased exponentially. In the field of power electronics, many inverters or other power conversion circuits are now fully digitally controlled. The use of digital control has the advantages of simple circuit, complex algorithm that is difficult to achieve with analog circuit, intelligent management, and convenient performance upgrade. [0003] However, after digital control is adopted, all intermediate variables and results of detection, operation, control and other links are stored in the internal RAM of the CPU, and become the ever-changing data in the internal registers. The CPU is like a black box, and these data packets are invisible and intangible inside, ...

AI Technical Summary

Problems solved by technology

However, for fully digital circuits, all data or waveforms related to control and protection are stored in the internal registers of the control CPU, and it is impossible to use external instruments for measurement and storage. If you cannot observe the continuously changing waveforms of various relevant data inside the DSP to analyze, Then we can only use the elimination method to find out all possible causes of the failure, and test and troubleshoot them one by one.

This will be time-consuming, labor-intensive, and inefficient, and the elimination method may not be able to find out the real problem; moreover, some faults occur irregularly, and it is impossible for technicians to wait for a long time by the machine and stare at the instrumentation to grasp For the waveform at fault, it is preferable that the required waveform can be automatically captured and latched by the control CPU when a fault occurs, so that it can be intelligent and humanized. Therefore, the present invention proposes a digitally controlled fault Waveform capture and analysis methods to address deficiencies in prior art