Needle pitch detection method, needle pitch detection device, sewing machine and readable storage medium

The invention provides a needle pitch detection method. The needle itch detection method comprises the steps of detecting voltage parameter values of a magnetic element under at least two preset needle pitches by using a linear Hall element, and determining a linear relationship between the voltage parameter values and the preset needle pitches; and detecting the voltage parameter values of the magnetic element under the current needle pitch by using the linear Hall element, and calculating the current needle pitch according to a linear relationship corresponding to the voltage parameter values. The needle pitch detection method provided by the invention can detect a real-time needle pitch value, has high reliability, and is not affected by environmental factors such as dust to fail. 本发明提供一种针距检测方法，针距检测方法包括利用线性霍尔元件检测磁性元件在至少两个预设针距下的电压参数值，确定电压参数值与预设针距之间的线性关系式；利用线性霍尔元件检测磁性元件在当前针距下的电压参数值，并根据与电压参数值相对应的线性关系式计算当前针距。本发明提供的针距检测方法能够检测实时针距值的大小，并且可靠性高，不会受灰尘等环境因素的影响而失效。