Gas normal pressure sampling device suitable for vehicle-mounted measurement

The invention relates to a gas normal pressure sampling device suitable for vehicle-mounted measurement. The gas normal pressure sampling device is characterized by comprising a sampling outer pipe, a gas sampling pipe, a pressure sensor, a stepping motor and two porous plates, wherein the sampling outer pipe consists of a thin pipe and a thick pipe which are integrally arranged; the thin pipe and the thick pipe are connected by adopting a diffuse type structure; a branch pipe which extends downwards is arranged on a side wall of the thick pipe; one end of the gas sampling pipe penetrates through the branch pipe and is communicated with an inner cavity of the thick pipe; the other end of the gas sampling pipe is connected with a first end of a three-way joint, a second end of the three-way joint is connected with a sampling header pipe of a gas concentration detection instrument, and a third end of the three-way joint is connected with the pressure sensor; the pressure sensor is electrically connected with the stepping motor; the stepping motor is fixed on the porous plate positioned on the outer side, and a rotating shaft of the stepping motor penetrates through the porous plate positioned on the outer side and is rotationally connected with the porous plate positioned on the inner side. The gas normal pressure sampling device can be widely applied to gas sampling during aerial survey.