Digital circuit state detection circuit and digital circuit state detection method

Abstract

The invention relates to a digital circuit state detection circuit and a digital circuit state detection method, and belongs to the technical field of electronics. The circuit comprises a digital state detection processing module, a controller, and a state indication communication module. The detection processing module includes a protection circuit, a voltage division circuit, and a clamping circuit. The circuit converts the voltage of a three-digital-state signal, sends the signal to an AD sampling interface of the controller, compares an acquired signal with a calibration value preset by the controller, and finally judges and displays the three states of a digital circuit. On the basis of expansion, circuit self-detection and detected circuit fault location and alarm indication can be realized. Artificial manual line check is not needed for the confirmation of circuit connection. Therefore, detection is more convenient and more efficient, and fault location is quicker and more accurate. The technical problem that the efficiency of traditional digital circuit state detection is low and fault isolation and location is difficult to realize is solved effectively, and the reliability of circuit detection is improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a digital circuit state detection circuit and method. Background technique [0002] Traditional digital circuits are usually processed by several branch resistor networks and sent to the digital sampling port of the controller, and the internal preset program of the controller is used to identify the digital state of each branch. The number of interfaces in the circuit determines the number of branches in the resistor network. In practical applications, there are often cases where external wiring is wrong or the line is not connected. At this time, it will be extremely troublesome for the debugger to check the line through the detection equipment, especially in the case of poor wiring environment. It increases the difficulty of manual debugging, and because multiple different detection devices are involved when the circuit is complex, the inconvenient detection of the circui...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of inconvenient digital circuit state detection and failure to isolate and locate faults in the existing methods, the present invention provides a digital circuit state detection circuit and method. The specific technical solutions for solving the above technical problems are as follows:

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