Time-frequency signal experimental system based on industrial field data
An experimental system and signal technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as the lack of comparison between the original signal and the acquired signal, the inability to meet the analysis requirements, and the inability to find a processing method, so as to expand the practical The effect of applying the function
Inactive Publication Date: 2013-10-02
CHINA JILIANG UNIV
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However, only analyzing the analog signal cannot meet the analysis requirements of the system for the actual signal.
[0004] 2. There is no comparison between the original signal and the collected signal, and it is impossible to know the change of the system collected signal compared with the original signal and whether it is a relatively complete reproduction of the original signal
[0005] 3. The time-frequency analysis method for the signal is relatively single, and multiple methods cannot be used to analyze and process the same signal, and the optimal processing method cannot be found
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[0015] The invention develops a time-frequency analysis system based on industrial field signals and various simulation signals through a signal generator, a data acquisition card and virtual instrument software. This system mainly includes three parts, signal generation part, signal acquisition part and signal analysis part. Such as figure 1 As shown, the signal generation part (signal generator) and the signal acquisition part (data acquisition card) communicate with the computer through the USB interface, and the signal analysis is completed on the computer (based on the LabVIEW software analysis system), while the signal generator and the data acquisition card Connected by the probe.
[0016] The signal generation part is mainly composed of a signal generator. The signal generator can generate two kinds of signals: one is the simulation signal, which is generated by the computer software to control the signal generator; the other is the industrial signal, and the compute...
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The invention relates to a time-frequency signal experimental system based on industrial field data, which comprises a computer, a signal generator, a data acquisition card and a LabVIEW software, wherein both the signal generator and the data acquisition card are connected with the computer, the LabVIEW software is installed in the computer, the signal generator generates signals of different wave shapes, the signals comprise emulation signals and industrial signals, the data acquisition card directly acquires the signals of different wave shapes generated by the signal generator, sends the signals to the computer and displays the signals on the computer; multiple acquired simulated industrial signals are processed according to different time-frequency analytical algorithms in the LabVIEW software. The computer can generate both the emulation signals and the multiple industrial signals through controlling the signal generator, the industrial data acquisition process is simulated in a lab, and a user can perform signal analysis of true situations conveniently.
Description
technical field [0001] The invention belongs to the field of signal acquisition, analysis and processing, and relates to a time-frequency signal experiment system based on industrial field data. Background technique [0002] The existing signal acquisition and analysis systems collect real signals for analysis and processing, or directly analyze the analog signals generated by the software. The analysis methods are relatively simple and have no comparison. In many cases, a certain analysis method is not suitable for all signals. both work. The main deficiencies are: [0003] 1. Most systems only analyze actual signals, or a single analysis of analog signals. The actual signal analyzed requires on-site real-time measurement storage before it can be used for analysis of some specific functions. However, only analyzing the analog signal cannot meet the analysis requirements of the system for the actual signal. [0004] 2. There is no comparison between the original signal a...
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Inventor 孙斌刘彤赵玉晓
Owner CHINA JILIANG UNIV