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Digital junior high school electrical experiment demonstration device

An electrical experiment and demonstration device technology, applied in the field of electrical experiment demonstration, can solve the problems of inability to realize experimental data in real time, unintuitive and profound, etc., and achieve the effect of omitting cumbersome links, easy operation, accurate and real-time collection

Pending Publication Date: 2022-02-18
宁波捷课教育科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is that most of the experimental data in the prior art are manually calculated and recorded in a single time, and the analysis and comparison of the experimental data cannot be realized in real time, and the experimental demonstration effect is not intuitive and profound.

Method used

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  • Digital junior high school electrical experiment demonstration device
  • Digital junior high school electrical experiment demonstration device
  • Digital junior high school electrical experiment demonstration device

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Embodiment 1

[0040] refer to figure 1 , the present embodiment provides a digital junior high school electrical experiment demonstration device, including a sensing unit 100, an acquisition unit 200, and a processing unit 300, wherein the sensing unit 100 acquires an analog signal of the voltage or current of the circuit under test, and converts the voltage / current The sensor, that is, the sensing unit 100, is connected to the circuit under test. The collected analog signal is first amplified by the operational amplifier circuit of the instrument, then selected by the analog switch, and then entered by the single-chip microcomputer for A / D conversion, and finally through the TYPE The -C data line uses serial communication to transmit digital signals to the acquisition board circuit, and communicates with the acquisition unit 200 in real time, and responds to commands distributed by the acquisition unit 200 in real time.

[0041] Further, the acquisition unit 200 assigns priority to the acqui...

Embodiment 2

[0044] refer to Figure 1-16 , is the second embodiment of the present invention, this embodiment is based on the previous embodiment, and the difference from the previous embodiment is that the sensing unit 100 includes a sequentially connected data signal acquisition and amplification circuit 101, a switch circuit 102, a signal processing The circuit 103 , the first interface circuit 104 , and the signal collected by the sensing unit 100 are transmitted to the collection unit 200 through the collection amplifier circuit 101 , the switch circuit 102 , the signal processing circuit 103 , and the first interface circuit 104 in sequence. Specifically, the acquisition and amplification circuit 101 amplifies the collected signal value, then selects the range through the switch circuit 102, then performs A / D conversion through the signal processing circuit 103, and finally converts the digital value through the TYPE-C data line using serial port communication. The signal is passed ...

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Abstract

The invention discloses a digital junior high school electrical experiment demonstration device. The device comprises: a sensing unit, wherein the sensing unit is used for acquiring analog signals of voltage or current of a tested circuit; an acquisition unit, wherein the acquisition unit distributes priorities to acquisition of each analog signal and communicates with a processing unit in real time; and a processing unit, wherein the processing unit is used for analyzing the data uploaded by the acquisition unit. Data are collected through the sensing unit and then projected to a popular multimedia teaching screen at present, digitization and tradition are combined by simulating a dial plate of a common instrument, the defects of a traditional instrument are overcome, the advantages brought by digitization are reflected, meanwhile, accurate and real-time collection of dynamic data is achieved in cooperation with a high-precision sensor, the problems of low data precision caused by hardware of a common instrument and manual reading errors caused by mechanical pointer display are solved, instrument reading of a traditional instrument is inherited, and basic requirements of current teaching and examination are met.

Description

technical field [0001] The invention relates to the field of electrical experiment demonstration, in particular to a digital junior high school electrical experiment demonstration device. Background technique [0002] In the teaching of electrical experiments in junior high schools, the readings of traditional experiments are mostly pointer-type, and the inside is a magneto-electric or electromagnetic structure, so the movement is slow, the display accuracy is poor, there are artificial reading errors, the sensitivity and accuracy are relatively low, and overload Poor ability. It is inconvenient for students to observe better when teachers are teaching, and it cannot be directly displayed on the computer or teaching equipment, and it does not have the ability to display real-time and intuitive experimental data in graphs; The analysis and comparison of experimental data cannot be realized in real time, and the experimental demonstration effect is not intuitive and profound....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/18G09B5/02G01R19/25
CPCG09B23/18G09B5/02G01R19/25
Inventor 周峰彭勇陈航黄嘉诚岳兴春周钰琛
Owner 宁波捷课教育科技有限公司
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