Original position soil salt content sensing transducer

Abstract

An in-situ soil salinity sensor transmitter, characterized in that the sensor transmitter consists of a four-electrode soil salinity measurement sensor, a signal generator, and a signal processing device as a whole, and uses alternating constant current signals as a measurement For the excitation signal, the four electrodes on the sensor respectively constitute a pair of excitation electrodes and a pair of collection electrodes, and the collection electrodes are located between the excitation 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.

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 integrated system for sensing and transmitting soil salinity content in situ. 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 continuous dynamic determination.

[0003] Porous ceramic chip soil salin...

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