A non-invasive soil moisture acoustic detection device and method

Abstract

The invention discloses a non-invasive soil moisture sound wave detection device and method. The device comprises a sound wave excitation and monitoring host, a base support, a sliding fixing device and a transducer installation control device. The sound wave excitation and monitoring host comprises a main control switch, a touch display screen, a sound wave transmitting channel, a sound wave receiving channel and an infrared sensing port. The sound wave excitation and monitoring host is also internally provided with an excitation and monitoring module, and the excitation and monitoring modulecomprises an MCU main control module, a sound wave excitation module, an infrared sensing module, a pressure control module, a display module and a power supply module. According to the device, the sonic probe does not need to be buried in a soil layer and can be directly pressed on the surface of the soil for detection, the infrared temperature detector can obtain the detection temperature in real time, temperature correction can be conducted on the detection result based on the detection temperature, and the device has the advantages of being good in repeatability, high in real-time performance and capable of achieving nondestructive detection.

Description

technical field [0001] The invention belongs to the technical field of soil moisture detection, and in particular relates to a non-invasive soil moisture acoustic wave detection device and method. Background technique [0002] Moisture is an important part of soil, and is an important parameter for farmland irrigation management, research on regional hydrological conditions, and calculation of water balance in watersheds, and soil moisture plays an extremely important role in the exchange of matter and energy between the surface and the atmosphere. A key variable in the parameterization of land surfaces. Therefore, the rapid, accurate and economical acquisition of soil water content information is conducive to the study and understanding of soil moisture dynamic changes and spatial distribution, and is of great significance for making timely scientific decisions or taking reasonable measures. At present, the measurement methods of soil moisture mainly include drying weighin...

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Problems solved by technology

At present, the measurement methods of soil moisture mainly include drying weighing method, neutron method, time domain reflectometry (TDR), frequency domain reflectometry (FDR), and remote sensing method. The only method of mass water content has incomparable advantages over other methods in terms of measurement accuracy, but the detected soil moisture information lacks timeliness. The neutron method cannot be widely promoted due to radiation hazards. TDR and FDR are based on soil dielectric The characteristic detection of soil moisture is greatly affected by the soil texture, and the detection results are not accurate enough. The remote sensing method shows unique advantages in large-area and multi-temporal soil moisture detection, but the detection results are easily affected by surface roughness, surface slope and vegetation cover, etc. Influence, the detection error is large and the detection equipment is expensive

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