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Multifunctional teaching oscilloscope

An oscilloscope and multi-functional technology, which is applied in the field of multi-functional teaching oscilloscopes, can solve the problems of occupying the area of ​​the experimental table, the experimental table is messy, and inconvenient to carry, and achieves the effects of comprehensive functions, accurate measurement, convenient and fast measurement signals, and simple structure

Pending Publication Date: 2019-01-18
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the experiments of electronic information majors, electronic instruments such as oscilloscopes and spectrum analyzers are increasingly inseparable, but the electronic instruments used in the laboratory usually have the disadvantages of high price, overlapping functions, bulky instruments, and inconvenient portability.
Expensive imported instruments bring a lot of expenses to colleges and universities. On the other hand, once students need to use multiple instruments in experiments, it will take up a large area of ​​the experimental table, resulting in messy and crowded experimental tables.

Method used

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  • Multifunctional teaching oscilloscope
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  • Multifunctional teaching oscilloscope

Examples

Experimental program
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Effect test

Embodiment 1

[0034] refer to Figure 7 In the present invention, under the oscilloscope function, the user selects the displayed horizontal and vertical sensitivities, input impedance, trigger mode, and coupling mode through the oscilloscope function interface of the touch screen 56 . After clicking OK, the measured waveform is displayed on the left side of the screen, and added measurements such as frequency, period, amplitude, peak-to-peak value, and DC are displayed on the right side of the screen. The oscilloscope can measure two signals at the same time. The signal is input to the impedance selection / DC blocking circuit 11 through the SMA1 or SMA2 interface of the automatic gain control module 1, and the DC signal is measured by the DC detection circuit 12, and the measurement result is displayed on the touch screen 56. After the input signal is impedance-matched and filtered out, the amplitude of the signal is adaptively adjusted through the first relay switching circuit 13, the ten-...

Embodiment 2

[0037] refer to Figure 7 In the present invention, under the spectrum analysis function, the user selects the frequency point interval of the displayed spectrum under the spectrum analysis function interface of the touch screen 56 . After clicking confirm, the measured spectrum is displayed on the touch screen 56, and the signal is input by the SMA port of the automatic gain control module 1, wherein the processing of the signal by the automatic gain control module 1, the signal amplification module 2 and the frequency switching module 3 is basically the same as that in the oscilloscope mode , the sampling rate of the high-speed ADC module 42 in the FPGA signal analysis module 4 is fixed to 100MSPS after the waveform data of the signal through the sampling rate transformation carries out the FFT operation of 1024 points, and the real part and the imaginary part square of the operation result of the FFT are summed and then opened After obtaining the spectrum of the signal, the...

Embodiment 3

[0039] refer to Figure 7 In the present invention, under the logic analysis function, the signal is input by the pin row of the first comparison circuit 23 in the signal amplification module 2, and the horizontal sensitivity can be selected under the spectrum analysis function interface. After clicking to confirm, the timing of several channels is displayed on the touch screen 56 superior. Under the amplitude-frequency characteristic measurement function, the input of the network to be tested is connected with the frequency sweep source output of the high-speed DDS module 55, and the output of the network to be tested is connected with the SMA port input of the automatic gain control module 1, which can be performed under the frequency characteristic measurement function interface. After selecting the frequency step and frequency range of the frequency sweep signal, and clicking OK, the amplitude-frequency response diagram and phase-frequency response diagram of the network t...

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Abstract

The invention discloses a multifunctional teaching oscilloscope, characterized in that the teaching oscilloscope is formed by serially connecting an automatic gain control module with a signal amplification module, a frequency switching module, an FPGA signal analysis module and an ARM single-chip microcomputer module in turn. And the FPGA signal analysis module is connected with the automatic gain control module. The automatic gain control module, the signal amplification module, the frequency switching module, the FPGA signal analysis module and the ARM monolithic integrated circuit module are powered by a power supply module connected with the automatic gain control module, the signal amplification module, the frequency switching module, the FPGA signal analysis module and the ARM monolithic integrated circuit module. Compared with the prior art, the oscilloscope has the advantages of simple structure, convenient portability, function synthesis and accurate measurement. And is suitable for the comprehensive signal analyzer used in the electronic experiment of university students, so that the students majoring in electronics can measure signals more conveniently and quickly in the experiment.

Description

technical field [0001] The invention relates to the technical field of electronic instruments, in particular to a multifunctional teaching oscilloscope used for experimental teaching or engineering measurement. Background technique [0002] In the experiments of electronic information majors, electronic instruments such as oscilloscopes and spectrum analyzers are increasingly inseparable. However, electronic instruments used in laboratories usually have the disadvantages of expensive, overlapping functions, bulky instruments, and not easy to carry. Expensive imported instruments bring a lot of expenses to colleges and universities. On the other hand, once students need to use multiple instruments in experiments, it will take up a large area of ​​the experimental table, causing the experimental table to be messy and crowded. Therefore, a comprehensive spectrum analyzer suitable for college students' electronic experiments is designed to make it more convenient, fast and accur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/18G01R23/16G01R23/165
CPCG09B23/18G09B23/187G01R23/16G01R23/165
Inventor 刘一清宋梦欣
Owner EAST CHINA NORMAL UNIV