Demo instrument for demonstrating skin effect based on method of measuring resistance equivalently

Abstract

The invention discloses a demo instrument for demonstrating the skin effect based on a method of measuring resistance equivalently. The demo instrument comprises a box body, an interaction machine connected to the box body and a signal collecting unit. A signal generator and a skin effect generation unit electrically connected to the signal generator are arranged in the box body; the interaction machine is electrically connected to the signal generator and adjusts signal parameters in the signal generator input into the signal generator; a signal stream generated by the signal generator passesthrough the skin effect generation unit and has the skin effect on the skin effect generation unit. The signal collecting unit collects an electric signal of the skin effect generation unit and outputs a digital waveform image to display the skin effect. The demo instrument has a human-machine interaction function, can achieve the demand of high precision and high reliability in a certain error range, and improves the expression and display intuition of the skin effect mechanism and overcomes the defect that a skin effect teaching model is too abstractive, complex and hard to understand.

Description

technical field [0001] The invention relates to the technical field of skin effect demonstration instruments, in particular to a demonstration instrument for demonstrating skin effect based on an equivalent resistance measurement method. Background technique [0002] The skin effect causes the resistance of the conductor to increase as the frequency of the alternating current increases, and causes the efficiency of the wire to transmit current to decrease, consuming metal resources. The influence of skin effect must be considered in the design of radio frequency, microwave circuit and power transmission system. [0003] The existing skin effect demonstrator is composed of two identical circular thin iron columns and two identical small electric beads, one of which is welded on the axis of the two thin iron columns, and the other B is symmetrical Welded on the exterior. At the beginning of the demonstration, the brightness of lamp A and lamp B is the same; as the input flow...

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Problems solved by technology

[0007] In view of this, the embodiment of the present invention provides a demonstration instrument based on the method of equivalent resistance measurement to demonstrate the skin effect, which has a good human-computer interaction function, and can achieve high precision and high reliability within a certain error range It improves the intuitiveness of the expression and display of the skin effect mechanism, and overcomes the shortcomings of the skin effect mathematical model being too abstract, complex and difficult to understand

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