Prepunching device capable of being used for section soil moisture measurement system

Abstract

The invention relates to a prepunching device capable of being used for a section soil moisture measurement system. Three parallel protruding slide ways (1) are arranged on the inner wall of a limiting pipe (2) in the axis direction of the limiting pipe. Grooves with the same number as the protruding sliding ways (1) are formed in the positions, corresponding to the protruding slide ways (1), of the edge of a round steel plate (7). The round steel plate (7) does vertical motion in the axis direction of the limiting pipe under the action of external force, and the round steel plate (7) is further provided with two holes (8) allowing inserting needles (6) to penetrate. The two inserting needles (6) are fixed to the bottom of a mounting base (13). The top of the mounting base (13) is fixedly connected with an extension rod (4), and the mounting base (13), the inserting needles (6) and the extension rod (4) form an integrated part. The two inserting needles at the tail end of the integrated part penetrate through the holes (8) of the round steel plate respectively, the integrated part pushes the round steel plate (7) to vertically move downwards along the protruding slide ways (1) in the limiting pipe (2), and finally two prepunched holes (9) allowing the section soil moisture measurement system to measure the moisture content of soil are punched in the drilling bottom.

Description

technical field [0001] The invention relates to equipment for studying the response relationship between soil moisture changes and hydrological processes under changing environments, and belongs to the field of hydrological research equipment, in particular to a pre-punching device for measuring deep soil moisture by a profile soil moisture measurement system. Background technique [0002] The profile soil moisture measurement system is based on the time domain reflection technology of the profile soil moisture sensor, which is used to directly measure the dielectric constant of soil or other media. The dielectric constant is closely related to the soil moisture content. The soil moisture content can be simulated The voltage output is calculated and displayed by the readout system. This technology is the mainstream principle of current soil moisture measurement devices, which can measure soil moisture continuously, quickly and accurately. It can also be used to measure the ...

AI Technical Summary

Problems solved by technology

[0004] The present invention designs a kind of pre-punching device that can be used in the profile soil moisture measurement system, and the technical problem it solves is that when the existing profile soil moisture measurement system is used to measure the deeper soil moisture, due to the supporting pre-punching device The probe of the profile soil moisture measurement system cannot be accurately inserted into the pre-drilled hole at one time, which may cause damage to the probe of the profile soil moisture measurement system

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