Portable non-sinusoidal periodic signal decomposing and synthesizing experimental device

Abstract

The invention relates to a portable non-sinusoidal periodic signal decomposing and synthesizing experimental device, which comprises a portable multifunctional data collecting apparatus, a non-sinusoidal periodic signal decomposing and synthesizing circuit module and a direct-current power supply module, wherein the direct-current power supply module is connected with the portable multifunctional data collecting apparatus and the non-sinusoidal periodic signal decomposing and synthesizing circuit module respectively; the portable multifunctional data collecting apparatus comprises a collecting apparatus body which is connected with a computer, a signal generator connected with the collection apparatus body, generates a non-sinusoidal periodic signal under the control of the computer and transmits the non-sinusoidal periodic signal into the non-sinusoidal periodic signal decomposing and synthesizing circuit module, and a digital oscilloscope which is connected with the collection apparatus body and collects the actual signal waveform of the non-sinusoidal periodic signal decomposing and synthesizing circuit module under the control of the computer; further, the signal generator and the digital oscilloscope are integrated in the collecting apparatus body. Compared with the prior art, the portable non-sinusoidal periodic signal decomposing and synthesizing experimental device has advantages of being portable, being intelligentized and being simple in structure, and the like.

Description

technical field [0001] The invention belongs to the technical field of electronic engineering, and in particular relates to a portable non-sinusoidal periodic signal decomposition and synthesis experimental device. Background technique [0002] The idea of ​​signal decomposition and synthesis is an important basis for signal processing and system analysis and design. The decomposition and synthesis of periodic signals is a typical case of the transformation of signal and system analysis from the time domain to the transform domain, which helps students establish the basic concepts and methods of signal spectrum characteristics and system frequency domain analysis. According to the Fourier series expansion of periodic signals, any non-sinusoidal periodic signal (period T 1 ), as long as the Dirichlet condition is met, it can be expanded into a triangular Fourier series, as shown in formula (1), which is represented by the DC component and the fundamental wave (fundamental an...

AI Technical Summary

Problems solved by technology

When all the experimental teaching is carried out on the software platform, it can only be limited to the calculation of theoretical models, which is out of touch with the actual physical circuit objects

However, the traditional experimental methods based on experimental boxes, such as THKSS signal and system experimental box, DICE-T3 signal and system experimental instrument, etc., their electronic circuits are fixed, and generally can only provide relatively simple verification experiments. Under the condition that the instrument is working normally, students can still complete the experiment if they do not understand the experimental principle and circuit structure as long as the wiring is correct, which is not conducive to students' analysis and understanding of related content

In addition, because the circuit of the experimental box needs to be equipped with external instruments, such as signal generators, digital oscilloscopes, DC regulated power supplies, etc., to work normally, students can only go to the laboratory site to conduct experiments.

Patent 201120204443.4 "Signal Harmonic Decomposition and Synthesis Device" simplifies the circuit design for the decomposition and synthesis experiments of periodic signals, but its signal source circuit can only generate square wave signals, and cannot generate other types of periodic signals. The verification method of its output is also Relatively simple, only numerical parameters can be displayed, and the waveform display function can only be realized through an external oscilloscope

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