Soil ion concentration sensor suitable for hypergravity environment

By designing a layered structure sensor suitable for hypergravity environments, the problem of stable operation of the sensor under hypergravity conditions was solved, enabling real-time and continuous monitoring of heavy metal ions, overcoming electromagnetic interference and corrosion effects, and providing monitoring data with high temporal resolution.

CN121558710BActive Publication Date: 2026-07-07ZHEJIANG UNIV
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Patent Information

Application Number
CN202511976571.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-12-25
Publication Date
2026-07-07
Estimated Expiration
2045-12-25

AI Technical Summary

Technical Problem

Existing sensors are difficult to operate stably for a long time in hypergravity environments, and cannot achieve real-time, continuous, in-situ monitoring of heavy metal ion concentrations. They are also susceptible to electromagnetic interference and corrosion, and cannot accurately reflect the ion migration process.

Method used

A layered soil ion concentration sensor was designed, comprising an encapsulation layer, a pore water extraction filter membrane, a measurement layer, and a base layer. It incorporates microfluidic channels and a fluorescent fiber optic sensor, utilizing hypergravity acceleration to promote pore water flow and filtering soil particles through micropores to achieve stable liquid flow and optical detection. Combined with temperature and pH compensation, it provides resistance to electromagnetic interference and corrosion.

Benefits of technology

Real-time, continuous, in-situ monitoring of heavy metal ions was achieved under hypergravity conditions, avoiding sampling interference, providing high temporal resolution data, with a compact structure suitable for limited spaces, and the detection results truly reflect the ion migration process, possessing anti-electromagnetic interference and corrosion resistance characteristics.

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Abstract

The application discloses a soil ion concentration sensor suitable for a supergravity environment, which comprises, from top to bottom, a packaging layer, a pore water extraction filter membrane, a measuring layer and a substrate layer; the packaging layer is provided with a sampling window; the pore water extraction filter membrane is provided with a filter hole area completely overlapping with the sampling window; the top surface of the measuring layer is provided with a microfluidic channel in a groove type structure and a fluorescent optical fiber concentration sensor arranged in the microfluidic channel; and the main channel at the first end of the microfluidic channel overlaps with the filter hole area of the pore water extraction filter membrane. The application has the advantages of small volume, strong anti-electromagnetic interference ability, high g resistance and corrosion resistance, can be embedded in the soil pore environment for long-term stable work, and realizes in-situ detection of heavy metal ion concentration through the fluorescent optical fiber concentration sensor.
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