Power failure detection circuit of flat knitting machine and power failure detection method thereof

Abstract

The invention provides a power failure detection circuit of a flat knitting machine and a power failure detection method thereof. The power failure detection circuit of the flat knitting machine comprises a zero-cross detection circuit for performing zero-cross detection on alternating voltage input to the flat knitting machine and outputting a zero-cross detection signal, a controller connected with the zero-cross detection circuit and used for judging whether the zero-cross detection signal is received within preset time or not and confirming that the alternating voltage is in a power failure state if the zero-cross detection signal is not received within the preset time. By adopting the mode, the power failure detection can be timely and rapidly achieved, a corresponding measure can be further taken when a power failure phenomenon occurs, and loss caused by power failure is avoided.

Description

technical field [0001] The invention relates to the technical field of flat knitting machines, in particular to a power-off detection circuit of a flat knitting machine and a power-off detection method thereof. Background technique [0002] The flat knitting machine is a kind of textile machinery, which is equivalent to replacing manual weaving with machinery, which can greatly reduce labor costs. The flat knitting machines in the prior art generally use AC power supply, which often causes unnecessary losses when power failure occurs. Therefore, how to quickly and timely power failure of AC power supply, and then take corresponding measures to avoid losses caused by power failure has become a problem. An important topic in the field of flat knitting machines. Contents of the invention [0003] Embodiments of the present invention provide a power-down detection circuit and a power-down detection method for a flat knitting machine, which can realize power-down detection in ...

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