Miniature TDR soil water content measuring probe

Abstract

The invention discloses a miniature TDR soil water content measuring probe. A probe A and a probe B are bent into an S shape and are arranged in parallel at intervals, the probe A and the probe B are both installed on a support plate, one end of the probe A serves as a welding point A and is connected with one end of the connecting wire A in a welded mode, and one end of the probe B serves as a welding point B and is connected with one end of the connecting wire B in a welded mode. The connecting wire A and the connecting wire B penetrate through holes in the welding point A and the welding point B of the support plate and then penetrate out to be connected into a coaxial cable, the connecting wire A is connected with a coaxial cable outer conductor in the coaxial cable, the connecting wire B is connected with a coaxial cable inner conductor in the coaxial cable,the coaxial cable inner conductor is connected with an information exciter, and coaxial cable outer conductor is connected with an information collector through a connecting wire C. The test precision of the probe on soil moisture content data reaches 10% or below, high-precision measurement on the soil moisture content can be achieved, and the size of the probe is 30% of that of a traditional TDR probe.

Description

technical field [0001] The invention belongs to the field of detection technology and relates to a water content testing probe, in particular to a miniature TDR soil water content measuring probe, which can be used for monitoring the soil water content of plants in pots. Background technique [0002] At present, there are few TDR technologies for detecting soil water content in plant pots, and most of them are traditional linear TDR probes, and the probe size is not suitable for monitoring soil water content in smart agriculture. Partially exposed in the air, the main body cannot be completely submerged in the soil for measurement, resulting in large errors, and the length of the probe will be greatly reduced with the shortening of the probe size when miniaturized; it is difficult to meet the requirements of smart agriculture for small TDR probes Therefore, it is necessary to invent a new type of small TDR probe. Contents of the invention [0003] In order to solve the pr...

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Problems solved by technology

[0003] In order to solve the problems existing in the background technology, the present invention proposes an S-type TDR probe and an information collection device, which can accurately measure the water content of the plant soil in the pot, and overcome the problem that the existing instrument probes are partially exposed to the air The problem of large errors in measurement data

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