Non-invasive nuclear magnetic resonance granary reserve detection device and detection method

Abstract

The invention relates to a non-invasive nuclear magnetic resonance granary reserve detection device and detection method. The device comprises a main detection device, a weak magnetic sensor array, auniversal rotating support and an excitation coil. During detection, the universal rotating support and the excitation coil rotate to a to-be-detected angle, the main detection device starts direct-current detection to excite moisture in grains, the weak magnetic sensor array collects nuclear magnetic resonance signals after direct-current hard shutdown, and whether adulteration exists or not canbe preliminarily judged at the moment; and then, the main detection device can restart direct current and alternating current for combined excitation, wherein the direct current is in soft turn-off atthe moment, and the weak magnetic sensor array collects nuclear magnetic resonance signals after excitation is finished, stores the nuclear magnetic resonance signals and transmits the nuclear magnetic resonance signals to a handheld terminal for analysis. According to the invention, through the universal rotating support, the excitation coil and the array type weak magnetic sensor, the reservesof the granary can be detected, and adulteration of the local granary in the inspection process is prevented; and the advantages of no damage, high efficiency and fine imaging are achieved, and the application range of the nuclear magnetic resonance method is expanded.

Description

technical field [0001] The invention belongs to the technical field of granary management and grain storage volume detection, in particular to a non-invasive nuclear magnetic resonance grain storage volume detection device and detection method suitable for grain adulteration during granary inspection. Background technique [0002] my country has a huge population and severe requirements for grain reserves. As of the end of 2018, my country's total warehouse capacity exceeded 630 million tons. Due to the large base of grain reserves and huge profits, some granaries have adulteration, virtual warehouses, and self-theft in the management process, which has caused large economic losses to the country and indirectly affected the emergency use of grain reserves. At present, when inspecting granaries in my country, the method of combining entry and exit record accounting with actual storage situation detection is generally adopted. However, most of the existing grain storage inspe...

AI Technical Summary

Problems solved by technology

However, during the inspection of the granary, the inspectors still need to calculate the storage of the granary according to the monitoring records

In addition, due to the inability to visually check the situation inside the granary in real time, when the situation of guarding and stealing occurs, it is still impossible to judge the real situation in the face of real situations such as adulteration and virtual warehouses.

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