A high-fidelity underground water automatic sampling and sample splitting system and control method

Abstract

The present application relates to the technical field of industrial internet of things and environmental monitoring, and discloses a high-fidelity automatic groundwater sampling and sample splitting system and a control method. The system comprises a power field stability maintenance unit, an interface state locking and piercing unit and a volume self-adaptive compensation unit. The power field stability maintenance unit obtains a fluid pumping mechanism motion phase sequence and outputs a compensation pressure in a feedforward time window to maintain the time derivative of the transient pressure of the fluid delivery pipeline greater than or equal to 0; the interface state locking and piercing unit generates an in-situ water droplet on the end face of the piercing needle and performs sealed piercing to discharge the gas in the needle and input the liquid medium body with a gas volume of 0; the volume self-adaptive compensation unit drives the elastic structure to occur proportional volume deformation by using the incompressible stress generated by the liquid medium body under heat. The present application solves the problems of phase state distortion and component dispersion in the process of groundwater sampling by establishing a full-link flow field and thermodynamic coupling constraint logic.

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