Limit counting timing control circuit for comprehensive anti-overshooting out-of-control

Abstract

The invention relates to a limit counting and timing control circuit for comprehensive anti-overrunning out-of-control. In addition to being compatible with all functions of the 555 time base circuit, new functions are expanded to solve the problem that the original over-limit / timing control circuit often loses control due to faults. , there are technical problems of potential safety hazards; the adopted technical solutions are: newly added over-limit and output current-limiting protection circuits, logic control circuits, and counting / timing circuits. When various extreme abnormal faults occur in the sensor or the circuit itself, the logic control circuit will produce anti-control protection, and the output port will be closed first to ensure effective prevention of loss of control. Used in temperature, pressure, water level, and timing control circuits, it can improve safety performance and avoid serious accidents such as fire or explosion during use. Therefore, the present invention has important practical value and is widely used in many application fields such as small household appliances, simple limit / count / timing control, nuclear power safety protection control and the like.

Description

technical field [0001] The present invention relates to an electronic circuit for limit counting and timing control, in particular to a comprehensive anti-overrunning out-of-control circuit that ensures the basic main control (upper and lower limit control or counting / timing control) circuit and anti-runaway in various extreme abnormal faults Limit count timing control circuit. Used in temperature, pressure, water level, timing / counting control electrical appliances, it can improve safety performance and avoid serious accidents such as fire or explosion during use. Therefore, the present invention is widely used in application fields such as small household appliances, simple limit control, counting / timing control, safety protection (including nuclear power safety protection control), and makes electrical products more cost-effective. Background technique [0002] In order to verify the novelty of the present invention, the inventor consulted a large amount of relevant tech...

AI Technical Summary

Problems solved by technology

[0006] The invention mainly solves the technical problem that the original basic main control (super upper and lower limit control and counting / timing control) circuit is often out of control due to abnormal faults, and there are potential safety hazards in use; it provides a method that can comprehensively monitor any input / output of the core circuit module / Settings / Control / Abnormal open-circuit faults at each port of the power supply and extreme abnormal faults such as short-circuiting with two poles of the power supply, or short-circuiting at adjacent ports, and comprehensively prevent the input terminal from exceeding the bottom limit or top limit and the output terminal short-circuit current impact and power supply Comprehensive anti-super-polar out-of-control protection function for various out-of-control failures such as power failure, to prevent the main control circuit from being out of control, and avoid serious accidents such as fire or pressure explosion in the controlled object (such as the out-of-control failure caused by the Fukushima nuclear power plant in Japan due to the earthquake) Disastrous accidents such as high temperature / high pressure explosions), to ensure the use of a safe and comprehensive anti-extreme out-of-control limit counting timing control circuit

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