Four-electrode original position soil salt content measuring method

A measurement method and four-electrode technology, applied in the direction of material resistance, etc., can solve the problems of measurement value deviation, inability to accurately measure rapid changes in soil salinity, matching differences, etc.
CN100520384CInactive Publication Date: 2009-07-29INST OF SOIL SCI CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF SOIL SCI CHINESE ACAD OF SCI
Publication Date
2009-07-29
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

A four-electrode in-situ soil salinity measurement method based on a four-electrode soil salinity sensor, characterized in that an alternating constant current signal is used as the measurement excitation signal, and the four electrodes on the sensor form a pair of excitation electrodes respectively and a pair of collecting electrodes, the collecting electrodes are located between the exciting electrodes. The output signal of the invention responds to the dynamic change of in-situ soil salinity in real time, without time lag and measurement accumulation error; the output analog quantity has excellent linear response to the soil salinity content, and can adapt to in-situ soil salinity measurement in a wide range of fields.
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Description

1. Technical field

[0001] The invention belongs to the field of design and manufacture of electronic measuring and testing instruments, and relates to an in-situ soil salinity sensing and transmission integrated system, in particular to a method for measuring soil salinity used in in-situ measurement. 2. Background technology

[0002] Soil salinity is an important indicator affecting basic soil properties, soil fertility and land productivity levels. In industries such as cultivated land quality assessment, saline-alkali soil treatment, irrigation area management, precision agricultural management, industrial pipeline layout, ecological environment monitoring, and scientific research, it is often necessary to perform in-situ determination or even in-situ continuous dynamic monitoring of soil salinity content. Therefore, in production practice, the determination of soil salinity content is required to develop in the direction of in-situ, reliable, convenient, accurate and con...

Claims

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