Liquid residual amount measurement structure

A structure of measuring a residual amount of liquid in a cartridge using a capacitance is described. According to an embodiment, the structure includes: a cartridge configured to receive liquid containing inhalation substances vaporizable by heating; at least one capacitance provided in the cartridge; a level having a signal line electrically connected to the capacitance; a MUX configured to select a signal input from the signal line; an AD converter configured to convert a capacitance value of the signal output from the MUX into a digital value; a calibration part configured to calibrate a signal level of the digital value output from the AD converter into distinguishable signal bands; and a control part configured to control the MUX to select the signal and determining the signal valueoutput from the calibration part. 本发明涉及一种利用电容测量烟弹中的烟液的余量的结构。根据本发明的测量烟弹中的烟液的余量的结构包括：烟弹，其能够容纳通过加热可汽化的含有吸入物质的烟液；设置在烟弹中的至少一个电容；层，其具有电连接至电容的信号线；MUX，其用于选择从信号线输入的信号；AD转换器，其用于将从MUX输出的信号的电容值转换为数字值；校准部，其用于将从AD转换器输出的数字值的信号电平校准为可辨识的信号带；以