Fully digital B-scan teaching demonstration instrument

Abstract

A fully digital B-scan teaching demonstration instrument comprises a box body. A printed circuit board is arranged in the box body. A fully digital B-scan teaching demonstration instrument circuit is arranged on the printed circuit board. The printed circuit board also includes an experiment state control keyboard, an experiment state number display zone, a reset button and a USB interface. A high-voltage analog switch unit circuit, a probe socket circuit, a high-voltage pulse generation circuit, a high-voltage isolation circuit, a DSC converter memory circuit, a video output circuit, a pseudo color output circuit, and a single-chip microcomputer control unit circuit are equipped with signal switching buttons. The probe socket circuit, the high-voltage pulse generation circuit, the DSC converter memory circuit, the video output circuit, the pseudo color output circuit and the single-chip microcomputer control unit circuit are provided with element plug sleeve members. The instrument is also equipped with an FPGA inner data output D / A converting circuit. The instrument can analyze and demonstrate the structure, principles and functions of a fully digital B-scan circuit in a multi-level and multi-direction manner to students, and helps the students to understand and grasp the theoretical knowledge about the circuit.

Description

technical field [0001] The invention relates to a teaching instrument, in particular to an all-digital B-ultrasound teaching and teaching instrument. Background technique [0002] A utility model patent with the announcement number CN 203607016 U (announcement date 2014-05-21) discloses an on-off full-digital ultrasonic training instrument. The training device is designed to facilitate online testing and troubleshooting for students, and it only serves as a practical training for B-ultrasound maintenance personnel. In the implementation of the training instrument, only the full-digital B-ultrasound circuit is divided according to the functional modules, and a limited manual on-off switch is set on the circuit to realize the circuit on and off, and it is intended to achieve the purpose of teaching. In this way, students can only see the fault phenomenon from the disconnected fault of the circuit, and cannot collect, analyze and study the signal processed by the circuit funct...

AI Technical Summary

Problems solved by technology

In this way, students can only see the fault phenomenon from the disconnected fault of the circuit, and cannot collect, analyze and study the signal processed by the circuit function module online, and cannot change the value of some components and the working status of some unit circuits , leading to the inability to fully understand the functions and principles of each component in the unit circuit and the components and unit circuits in the entire system circuit, and the points and areas for acquiring knowledge are few and narrow

In addition, the design of some circuit faults is unreasonable, such as connecting a "fault switch" in series with the input channel of the isolation circuit, which may destructively burn out the circuit

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