Liquid nitrogen height monitoring device and implementation method thereof

The invention discloses a liquid nitrogen height monitoring device and an implementation method thereof. The method comprises the following steps: acquiring a height signal of a liquid nitrogen tank through a monitoring device; the height signals comprise a first height signal, a second height signal and a third height signal; according to the height signal of the liquid nitrogen tank, the liquid nitrogen height and the liquid nitrogen adding height threshold value are determined through the signal processing system, the control signal is triggered to control the display content of the displayer, and the display content comprises the liquid nitrogen real-time height, the liquid nitrogen adding height threshold value and liquid nitrogen setting reminding; the liquid nitrogen height threshold value is the actual loading capacity height of the liquid nitrogen tank; when the real-time height of the liquid nitrogen is smaller than the liquid nitrogen height threshold value, liquid nitrogen setting reminding is con