Device for online detection of beer filling volume

The utility model discloses a device for the online detection of beer filling volume, which is based on the principle of a high-frequency electric field. The device comprises an electric field emitting circuit, an emitting polar plate, a receiving polar plate, a signal processing circuit, a detection result processing circuit and the like, wherein the emitting polar plat and the receiving polar plate are arranged on two sides of a bottle neck; the electric field emitting circuit produces high-frequency sinusoidal signals and sends the signals to the emitting polar plate; an electric field is formed between the emitting polar plate and the receiving polar plate; a beer bottle is positioned between the polar plates; the intensity of the electric field is influenced by the filling volume; and whether the filling volume is qualified is judged by the receiving polar plate and the signal processing circuit according to the variation of the electric field. The product realizes the detection mode which is harmless to